Home

Maths facts about time

Unlimited math practice with meaningful, up-to-date tracking on your child's progress. Parents nationwide trust IXL to help their kids reach their academic potential. Join now Browse & Discover Thousands of History Book Titles, for Less In math, time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future. Time is a used to quantify, measure or compare the duration of events or the intervals between them, and even, sequence events

The numbers on a clock The numbers on a clock refer to the time of the day for 12 hours. Basically time is told in 2 12 hour slots. 12 in the night- which is also called midnight- to 12 in the day- which is also called noon. The second 12 hour slot is from noon to midnight Time4MathFacts uses the power of technology and engaging gameplay to motivate students to move from learning math facts to math fact mastery. What students experience as they play games to practice math facts is an immersive world of fun characters, rewards for improving their recall, and confidence-building feedback showing them their progress The notion of an absolute time, one that's measurable and the same for all observers, was expressed most succinctly by Newton: absolute, true and mathematical time, of itself, and from its own nature, flows equably without relation to anything external 43 Fast Facts About Time Time flies over us, but leaves its shadow behind. —Nathaniel Hawthorne Time is the component quantity used to measure the duration of events, intervals between them, and their sequence Time Trivia and facts - Learn all about time and how it's supposed to be read with the help of our downloadable mathematics worksheet for kids

Then use the Math Trainer - Multiplication to train your memory, it is specially designed to help you memorize the tables. Use it a few times a day for about 5 minutes each, and you will learn your tables. Try it now, and then come back and read some more So, the two main ways for you to learn the multiplication table are: Reading over the. Time4MathFacts helps students practice math facts and build confidence in addition, subtraction, multiplication and division. Using an adaptive, individualized approach, Time4MathFacts allows students to work at the level that is right for them. As they learn math facts, the program adapts accordingly based on what they have already mastered In math, a month can be defined as a unit of time, used in calendars, which is 30 or 31 days long. A year has 12 months, namely - January, February, March, April, May, June, July, August, September, October, November and December. The number of days in a month vary from 30 to 31. There are 4 to 5 weeks in a month To prove this, we've compiled a list of 20 cool facts about maths which we encourage you to share with the children in your life. 1. The word hundred comes from the old Norse term, hundrath, which actually means 120 and not 100. 2. In a room of 23 people there's a 50% chance that two people have the same birthday. 3 Times Tables. Print out The Times Tables and stick them in your exercise book. Test Your Tables with an interactive quiz. Play with the Properties of the equation of a straight line. Visit the Math is Fun Forum. Math Tools :: Math Links. Mathematics is commonly called Math in the US and Maths in the UK

4. 2 and 5 are the only primes that end in 2 or 5. 5. An icosagon is a shape with 20 sides. Also Read: Mersal Mathematics: 5 Shortcuts for Multiplication! 6. Among all shapes with the same perimeter a circle has the largest area. 7. Among all shapes with the same area circle has the shortest perimeter. 8. 40 when written forty is the only. Purchase the Books & DVDs here: http://www.preschoolprepco.com/mathfacts/multiplication-division.phpMeet the Math Facts Level 1 makes multiplication and divi..

IXL Official Site - Math Practice, Ages 5-1

  1. Helping children learn the basic facts is an important goal in the Everyday Mathematics curriculum. Most children should have developed an automatic recall of the basic addition and subtraction facts by the end of the second grade. They should also know most of their 1, 2, 5, and 10 multiplication facts by this time
  2. These math games for kids are good to help to learn the multiplication tables. This is a beautiful addition to primary school education and a good foundation for mathematics assignments in high school. By exercising well and regularly, you can surprise your teacher in class with good answers
  3. Evidence for more complex mathematics does not appear until around 3000 BC, when the Babylonians and Egyptians began using arithmetic, algebra and geometry for taxation and other financial calculations, for building and construction, and for astronomy. The oldest mathematical texts from Mesopotamia and Egypt are from 2000 to 1800 BC

Math Facts Timed - Amazon Official Sit

The area of study known as the history of mathematics is primarily an investigation into the origin of discoveries in mathematics and, to a lesser extent, an investigation into the mathematical methods and notation of the past.Before the modern age and the worldwide spread of knowledge, written examples of new mathematical developments have come to light only in a few locales Math is a crucial subject to learning success, which students will continue through each grade of their school journey. Give your child a head start for more advanced math practice by showing them that they can actually enjoy solving equations! Forget dull and dry lessons that you have to convince reluctant students to complete Hit the Button is an interactive maths game with quick fire questions on number bonds, times tables, doubling and halving, multiples, division facts and square numbers. The games, which are against the clock, challenge and develop mental maths skills Identify the Coordinates Worksheets. Help Kids Calculate the Area and Circumference of Circles. Sin and Cosine Worksheets. Teach the Kids Polygons With These Nifty Worksheets for 2nd Grade. 3-Digit Addition Worksheets for Teaching Advanced Math to Students. Use These Simple Rules to Round Numbers Quickly and Correctly This video includes _ maths ,maths biggest sum ,biggest sum of maths ,15000 pejo ka ganit ka saval ,kitna time lga dunia ke sabse bde ganit ke saval me ,gk ,..

Parents nationwide trust IXL to help their kids reach their academic potential. Join now! Unlimited math practice with meaningful, up-to-date tracking on your child's progress Time Facts. Worksheets / Math / Arithmetic / Time Facts. We use time to sequence events, to compare their durations and the intervals between them, and to quantify the speed at which objects move and things change Tell time to the nearest minute. This will help learners to solve elapsed time problems within the hour. See the fact file below for more information on the time or alternatively, you can download our 20-page Measurement & Data: Time CCSS 3.MD.1 worksheet pack to utilise within the classroom or home environment. Key Facts & Informatio

Free elementary time and clock worksheets to print, complete online, and customize. Math Fact Cafe. TM. Home; Pre-Made Worksheets Kindergarten (K) First Grade (1st) Second Grade (2nd) Third Grade (3rd) Fourth Grade (4th) Fifth Grade (5th) Custom Worksheets Basic Facts Counting Money. Note, to set the mastery time, your child must have completed at least one Math Fact lesson. On the parent dashboard, click on view reports: Next, click on View Math Facts Report: Adjust the Mastery Time by clicking on the up and down arrows: Click on the Save Setting and close the window: All done Welcome to the time worksheets page at Math-Drills.com where taking your time is encouraged! On this page you will find Time math worksheets including elapsed time, telling time on analog clocks, calendars and converting time worksheets.. The calendars come in two different formats: yearly (all on one page) and monthly when you need extra space or a larger layout Math is everywhere. It's the source code of the universe. Most of the time math makes perfect sense. But sometimes math just gets. weird. These math facts that will blow your mind. You'll learn about the Birthday Paradox, secrets of Pi, how to create numeric palindromes with your mind, and our favorite: the mysteries of the number nine

What is Time? - Definition, Facts & Exampl

  1. g worse. According to a recent study by the University of Chicago, math anxiety has now been.
  2. Math facts are important because they form the building blocks for higher-level math concepts. When a child masters his/her math facts, these concepts will be significantly easier and the student will be better equipped to solve them faster. If the child spends a lot of time doing the basic facts, he/she is more likely to be confused with the.
  3. Math seems difficult because it takes time and energy. Many people don't experience sufficient time to get math lessons, and they fall behind as the teacher moves on. Many move on to study more complex concepts with a shaky foundation. We often end up with a weak structure that is doomed to collapse at some point
  4. Being able to quickly recall math facts helps students tremendously, especially as they learn more advanced math concepts throughout the years. Time4MathFacts is an online program that helps students practice and master their math facts in addition, subtraction, multiplication, and division. Whether your child is struggling in math or beginning.
  5. Multiplication Table Instructions. To use the times tables follow this guide: Select the times tables you want to try. Use the drop down boxes and select the one you think is the correct answer. Once you have completed all the questions press the OK Done button. You then see your results
  6. Problem 151: Time Zone Math - Students learn about time zones and perform simple clock calculations using common United States and European time zones. [Grade: 3-5 | Topics: time units; addition, subtraction] Problem 37: Time Zone Mathematics. Students will learn about the time zones around the world, and why it is important to keep track of.
  7. No conversion necessary. Minus 40 degrees, or 40 Below, is the only temperature that is the same in both Fahrenheit and Celsius. Other fun facts about the number 40: there are 40 standard spaces on a Monopoly board, the standard American work week is 40 hours, and 40 is the maximum number of players a MLB team can sign on its roster at one time

Time Trivia - Facts About Time - Math Worksheet for Kids

  1. Cool free online multiplication games to help students learn the multiplication facts. Practice the times tables while having fun at Multiplication.com
  2. 11. $3.75. Zip. Math Facts Fluency Timed Tests - Addition, Subtraction, Multiplication, Division, with Multiplication Table (Gr. 2-7). Use for diagnosis, practice, or review on a routine basis. Take Math Facts Fluency Timed Tests across grade levels your entire career. Answer keys not included
  3. Fact family worksheets focus on sets of related math facts, not specific operations. Teach your kids addition and subtraction at the same time, and reinforce the relationships in a fact family! Two fact families are introduced at each level and allow for progressive practice, or just use the worksheets at the end for comprehensive fact family.
Alcohol Beverages on Pinterest | Times Tables, Looney

Factual memory in math is the ability to recall math facts. These facts must be recalled accurately, with little mental effort. Procedural memory is used to recall how to do things -- such as the. Math facts are single-digit problems such as 7+9 or 6×8 or 14-5, and so on. A common name for all the multiplication math facts is the multiplication table.. Math fact fluency is the ability to answer all math fact questions instantly from recall without having to think through the problem. Students should be able to recall math facts. Math is measuring, sorting, building, noticing patterns, making comparisons, and describing the environment, as well as counting and knowing the names of shapes. There are many ways to incorporate math learning into everyday moments. Talking about math is also important and every bit of math talk helps. Research shows a small increase in math. Check out all the fun ways to learn math facts! I don't know about you, but practicing those flash cards isn't my idea of an exciting time. Thankfully, there are so many ways to make flash cards into a game! Check out this fun variety of games you can play to practice the basic math facts. 1

Time4MathFacts The fun and motivating way to build math

  1. Math Facts for Kids. Enjoy a wide range of fun math facts for kids. Check out some cool trivia related to the things that make mathematics such an interesting subject. Learn about amazing numbers that are so big it's hard to even understand them. Find facts about the golden ratio, pi, geometry, prime numbers and much more
  2. Math Comments. __ needs to memorize his/her basic addition and subtraction facts. __ has a solid understanding of all math concepts taught so far this year. __ has difficulty understanding and solving word problems. __ needs to practice reading time on analog clocks. __ needs to practice counting money
  3. A Time-line for the History of Mathematics (Many of the early dates are approximates) This work is under constant revision, so come back later. Please report any errors to me at richardson@math.wichita.edu. It should be noted that the brief descriptions given are just that brief. Their purpose is to hopefully instill a little curiosity and.
  4. Maths Chase uses machine learning to adapt and test you in the most efficient way to build confidence as you progress. We choose the right questions to help your child learn at a faster pace. Maths Chase makes learning fun and helps children gain confidence in a fun and engaging way
  5. Math Mnemonics and Songs. A collection of math mnemonics - songs, memory aids, some useful and some simply trivia, for various math facts and figures, arranged by major subjects: numbers, arithmetic, pre-algebra, algebra, geometry and trigonometry. Number Mnemonics for Kids. how to write numbers from 0 to 10. number of days in each month
  6. Mathematics education is in crisis: A third of all schoolchildren end up in remedial math courses, and the level of interest in the subject is at an all-time low
  7. Math Facts for Kids. Check out our math facts for kids and enjoy exploring a wide range of fun trivia and interesting information. Learn about numbers, geometry, math history, famous mathematicians and other topics related to the world of mathematics. Learn how to find the area of a circle, understand what a googol is, have fun reading famous.

new kid. x1. x 12. Some years, there are literally no women in Math 55. Shutterstock. Many more men enroll in the Math 55 courses than women. According to a report in the Harvard Crimson, just 17 women took the course between 1990 and 2006. In 2015, no women completed Math 55a. 13. Professors try to get students to drop the class Our online math curriculum puts extra attention on math facts during early elementary. Students can practice and master crucial math facts with Time4MathFacts, which is built into Time4Learning and provided at no extra cost to members. Being able to recall math facts in addition, subtraction, multiplication, and division quickly and. Begin your crash course on the little-known mathematical disorder with these 11 facts. 11 Facts About the Math Disorder Dyscalculia. BY A.K. Whitney. April 6, 2015 But at the same time, I. Basic math facts are the answers to simple equations in addition (e.g., 3 + 2), subtraction (e.g., 9 - 5), multiplication (e.g., 6 x 4), and division (e.g., 15 ÷ 3). When children have automatic recall of facts, they can quickly retrieve answers from memory without having to rely on counting procedures, such as counting on fingers

What is time? plus

Math Facts NOW! Math Facts NOW! is a simple yet effective program that will identify weak areas in your child's knowledge of the times tables and basic facts of math, and drill in those specific areas, automatically giving increased drills in those areas. Price: $15.95 Money back guarantee. See a review sent to us. www.mathfactsnow.co In these multiplication worksheets, the facts are grouped into anchor groups. Multiplying by Anchor Facts 0, 1, 2, 5 and 10 Multiplying by Facts 3, 4 and 6 Multiplying by Facts 7, 8 and 9 Multiplying by Facts 11 and 12 Multiplying by Facts 0 to 5 and 10 Multiplying by Facts 0 to 7 and 10 Multiplying by Facts 0 to 10 Dyscalculia (/ ˌ d ɪ s k æ l ˈ k juː l i ə /) is a disability resulting in difficulty learning or comprehending arithmetic, such as difficulty in understanding numbers, learning how to manipulate numbers, performing mathematical calculations and learning facts in mathematics.It is sometimes informally known as math dyslexia, though this can be misleading as dyslexia is a different.

Maths facts are fundamental assumptions about math, such as the times tables (2 x 2 = 4), for example. Still, the expectation of rote memorization continues in classrooms and households across the. Preschool Math Worksheets Coloring Pages Capacity Worksheets Monthly Calendar Printable 2020 Flashcards Maker Counting worksheets Preschool Number Sense Worksheets Number Recognition Worksheets Count by 2,3,4,5 Worksheets Hundreds Chart Ordinal Numbers Worksheets Preschool Time Worksheets Telling Time Worksheets Preschool Addition and. Student assessment & practice, jokes, printable results, and Mars Defense video game for developing basic math fact fluency We turn real math into a delightful game. Our K-6 curriculum is research-based, common core aligned, and comprehensive - with over 300,000 math problems and explanations. But even better, students will feel like they're playing a game

Free Printable Math Worksheets Most Popular Math Worksheets Math Worksheets Addition Worksheets Subtraction Worksheets Regrouping - Addition and Subtraction Fraction Worksheets Multiplication Worksheets Times Table Worksheets Time Worksheets Skip Counting Worksheets Math Wor.. Math Facts. Math Facts in Grade 4. In accordance with the National Council of Teachers of Mathematics Principles and Standards for School Mathematics, the Curriculum Focal Points (NCTM 2000, NCTM 2006) and the Common Core Standards for Mathematics, Math Trailblazers students are expected to develop proficient strategies for solving multidigit. A Brief History of Time Measurement. Age 11 to 18. Article by Leo Rogers. Published 2008 Revised 2019. Ever since humans first noticed the regular movement of the Sun and the stars, we have wondered about the passage of time. Prehistoric people first recorded the phases of the Moon some 30,000 years ago, and recording time has been a way by. 6. Math Lets You Manage Time. Time is our most valuable asset. Teach your students about the value of time by not only teaching how to tell time on analogue and digital clocks, but about the world clock, time zones, calendars, and the value of how they spend their precious time Matching Time. Age 5 to 7. Challenge Level. Try this matching game which will help you recognise different ways of saying the same time interval. Y ou may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above

Time Worksheets. Eliminate the hassle of creating practice resources for Kindergarten through grade 6 kids with these time worksheets packed with printable exercises and time problems. Dig into specifics like identifying time in terms of a.m. and p.m., reading analog and digital clocks, telling time, writing time in words, drawing hands on. Math helps you tell time I'm late, I'm late for a very important date. - White Rabbit from the movie Alice in Wonderland. Don't let your ignorance of math make you like the White Rabbit! A recent study indicated that 4 out of 5 children living in Oklahoma City can't read the hands on an analog clock to tell time Read about Ancient Egyptian mathematics, Babylonian mathematics, Chinese mathematics, Greek mathematics and much more. Find out where the numerical digits we use today come from, who invented the equals sign and other interesting math timeline facts and trivia. Have fun improving your math knowledge with our brief history of mathematics

43 Fast Facts About Time - Factinat

Ancient African Mathematics. Africa is home to the world's earliest known use of measuring and calculation, confirming the continent as the birthplace of both basic and advanced mathematics. Thousands of years ago, Africans were using numerals, algebra and geometry in daily life. This knowledge spread throughout the entire world after a series. Worldwide, the median number of paid vacation time available to workers is under 25 days a year. Collectively, workers leave about 20 percent of this time off unused. 8. Replicon found that in the 12 months leading to June 2015, December was the busiest month for vacation time across its worldwide customer base, followed by November and May

Among the 100 million or so nerve cells in the brain, it turns out there is a group dedicated to making sense of numbers. No one is born knowing their 1, 2, 3's or A, B, C's. However, the brain clearly handles these uniquely human but culturally varied types of knowledge differently Students are not taught basic math facts and are not given the opportunity to practice repeatedly over a long period of time; therefore, they may face obstacles when it comes to building fluency and automaticity. Caron (2009) acknowledged that students who fail to memorize basic math facts for several years may begin to avoid the task altogether

Race For Math Subjects Mathematics --Arithmetic Grades K-2 3-5 Brief Description A fun math race reinforces math facts in a very visual way. Objectives Students will reinforce math-facts knowledge and understanding. contribute to a team effort. carefully observe the actions of all team members. Keyword Knott started the website on Fibonacci Numbers and the Golden Section back in 1996 as an experiment at using the web to inspire and encourage more maths investigations both inside and outside of school time. It has since grown and now covers many other subjects, all with interactive elements and online calculators Free Math Facts Songs & Activities. At Math-U-See, we believe that students should not just be taught how to do math, but also the why behind it. But that doesn't mean that memorizing facts and formulas has no value; having math facts available on demand frees students to focus on new concepts and skills. Mastering addition facts is a.

A list of online games for clocks, calendars, and elapsed time. This is an annotated and hand-picked list of online games, tools, worksheets, and activities that you can use to help your children or students tell time or read the clock, practice reading calendars, and calculating elapsed time Multiplication Games for Math Centers. 1. Pop. This game is great for a center. Students can play with with a small group or with a partner. For this game, put math fact cards and pop cards into a container. Students take turns pulling one card out of the container. If they pull a math fact card, they must solve for the fact

It's time to throw on that swimming suit and get ready for some watercraft racing fun. Race your watercraft and learn math facts. What could be better? With multiple worlds and levels in each world, Watercraft Rush will definitely be one of your student's favorite games Inside - get the link for free visual flash cards that allow you to learn all your math facts in half the time! Math Facts Made Easy is part of the Instant Learning Series by best selling author Pat Wyman, and includes Spelling Made Easy, (ASIN number B009NWWW4S) Vocabulary Made Easy (ASIN number B00CIH36IG), Amazing Grades and more.. The following games develop the Math skill of multiplying in a fun and motivating way. Using these sheets will help your child to: learn their times table facts; practice and improve their multiplication table recall; develop their strategic thinking skills. All the Addition free Math sheets in this section follow the Elementary Math Benchmarks A timed drill is a multiplication worksheet with all of the single digit multiplication problems on one page. A student should be able to work all of the problems on the multiplication worksheets correctly in the allowed time. These multiplication worksheets are appropriate for Kindergarten, 1st Grade, 2nd Grade, 3rd Grade, 4th Grade. and 5th. Math Worksheets. Through topics such as family structures, immigration, and the value of education, show students how they can apply math and statistics to make real-life decisions and identify important changes in their community and country. Use the grade-range tabs below to explore math activities. Corresponding teachers' guides are.

Multiplication - Times Tables - Math is Fu

Incomplete Mastery of Number Facts be unable to recall basic math facts, procedures, rules, or formulas ; At the same time, standards-based tests with rigorous math sections were included. The children and adolescents were studying math in school; the researchers did not provide any math instruction. During the study, as the children aged from an average of 8.2 to 9.4 years, they became faster and more accurate at solving math problems, and relied more on retrieving math facts from memory and less on counting BrainPOP's math movies cover all sorts of calculations and computations: Tim and Moby talk you through algebra, probability, geometry, and even data analysis The Math Salamanders provide you with: A huge bank of free educational Math worksheets. Graded sheets so that you can easily select the right level of difficulty. Fun Math activities, puzzles and games to play. Practice worksheets to help your child to learn their basic math facts. The Math Salamanders caters for all Elementary grades, from. Math nerds everywhere are digging into a slice of pecan pie today to celebrate their most iconic irrational number: pi. After all, March 14, or 3/14, is the perfect time to honor the essential.

Time4MathFacts - Math Fact Fluency Program Time4Learnin

Add one-digit numbers - sums to 10. 2. Ways to make a number with addition - sums to 10. 3. Match addition sentences and models - sums to 10. 4. Write addition sentences to describe pictures - sums to 10. 5. Turn words into an addition sentence - sums to 10 In this busy world, we spend a lot of time moving from place to place in our cars, on buses and trains, and on foot. Use your traveling time as an opportunity to learn about math. Look around as you travel from place to place, and help your child find numbers on buildings, buses, taxis, and houses that they can add and subtract while on the road Selection File type icon File name Description Size Revision Time User; ć: Addition Power Points- Fullenkamp.pptx View Download: Math Addition Facts 263k: v. 1 : Nov 26, 2012, 4:46 P This free section of Sheppard Software was written for children. Mostly all of the material you'll find at the site is completely free for kids to use. These fun online math games cover all of the math fundamentals, including early math, basic and mixed operations, fractions, pre-algebra, dollars & cents and place value

What is Month? - Definition, Facts & Exampl

SuperKids Math Worksheet Creator. Have you ever wondered where to find math drill worksheets? Make your own here at SuperKids for free! Simply select the type of problem, the maximum and minimum numbers to be used in the problems, then click on the button! A worksheet will be created to your specifications, ready to be printed for use. Addition With The Math Worksheet Site you can create an endless supply of printable math worksheets. The intuitive interface gives you the ability to easily customize each worksheet to target your student's specific needs. Every worksheet is created when you request it, so they are different every time Math Worksheet Practice Workbook. 1st Grade Math and Critical Thinking Worksheets. Math Workbooks for First Graders following Common Core Standards: Chapter 1: Numbers to 10. Chapter 2: Number Bonds. Cumulative Review (Chapters 1-2) Chapter 3: Addition Facts to 10. Chapter 4: Subtraction Facts to 10. Cumulative Review (Chapters 3-4 Here we're going to look at twenty-four facts about the number 24. 24 is the atomic number for the chemical Chromium, a hard silvery gray metal. Four and Twenty was the name of a 20 th Century race-winning American racehorse. Born in 1958 the horse had a long career until retirement in 1971. 24 is the number of carats in 100% pure gold IXL is the world's most popular subscription-based learning site. Used by over 12 million students, IXL provides unlimited practice in more than 4 500 maths and English topics. Interactive questions, awards and certificates keep kids motivated as they master skills

20 Cool Facts About Maths Blog Whizz Educatio

No wonder some kids end up hating math before they've even finished 1 st grade! But, teaching the addition facts doesn't have to be like this. In this article, you'll learn everything you need to know to teach your child the addition facts—without killing your kid's love of math or wanting to poke your eyeballs out in the process Teachers should help students develop math facts, not by emphasizing facts for the sake of facts or using 'timed tests' but by encouraging students to use, work with and explore numbers. As students work on meaningful number activities they will commit math facts to heart at the same time as understanding numbers and math

Math is Fu

Fourth Grade Math Curriculum: What Students Will Learn. The Common Core Mathematics Standards for fourth grade state that students should: learn to use the four mathematical operations with whole numbers to solve problems; gain familiarity with factors and multiples; generate and analyze patterns; generalize place value understanding for multi-digit whole numbers; extend understanding of. Some simple math offers alarming answers. Medical staff wait outside rooms at the Red Cross hospital in Wuhan, China. AFP via Getty Images. M uch of the current discourse on — and dismissal of.

132 Facts - Multiplication Facts Quiz by Carrie Perez NBCT2 Times Table - Teaching Resource - YouTube100 Horizontal Questions -- Multiplication Facts to 144 (A)Srinivasa Ramanujan Biography, Achievements, life-struggleEvery Time I Try To Understand PhysicsMATH QUOTES image quotes at relatablySubtraction in Year 2Earthquakes | TheSchoolRun