PPT-Rounding Decimals NBT.4 Why do we “ROUND” numbers?

We round numbers to make them easier to work with We may round a number to a multiple of 10 10 100 1000 etc or we may round a decimal number to the nearest whole number Rounding allows us to solve mental math problems easier We can use rounding in situations where an exact answer is not necessary . Remember to Silence Your Cell Phone and Put It In Your Bag!. Comparing Rational Numbers (in fraction form). Models. For , where b>0, iff a<c.. For , where b>0 and d>0, . Understanding Rational & Irrational Numbers. CCSS 8.NS.A.1, 8.NS.A.2. Classifying Numbers Foldable. CLASSIFYING NUMBERS. Natural Numbers. Whole Numbers. Integers. Rational Numbers. Real Numbers. Natural Numbers. Objective: To Read, Write and Round Decimals. Writing Decimals in Words. Place Value Chart. Millions. Hundred Thousands. Ten Thousands. Thousands. Hundreds. Tens. Ones. .. Tenths. Hundredths. Thousandths. 1. Round these amounts to the nearest whole one:a) 3.2 1.7 4.9 6.1 7.8 5.3 8.7 2.5 8.3 9.9 Round these amounts to the nearest whole one:a) 3.67 2.34 5.76 8.91 3.12 2.56 8.96 5.32 7.34 3.633. Round the Intro . to Algebra. Why round?. On your calculator, take 132 ÷ 789. The answer is .16730038. Why round?. But we don’t want to write all that. . Most of it is so small that it doesn’t even have an effect on the number.. In which place is the 4 in. each of the following:. 140,399. 48,210. 450. 129,394. Write 2 equivalent. fractions for each of the. following:. Rounding Decimal Numbers. Estimating and Approximating Sums and Differences. the point?. Get it. ?. © . Mike’s Math Mall. Decimals. PowerPoint. Rounding. We round numbers to make them easier to use and understand while keeping them close to their actual value.. Hey!. That sounds. 6.NS.3. Fluently add, subtract, multiply and divide multi digit decimals using algorithms for each operation.. Product. The product is the answer when two or more numbers are . multiplied. together. . Created by: Libby Maccani. Educational Concern. BIG IDEA: . Estimation: Numbers can be approximated by numbers that are close. Numerical calculations can be approximated by replacing numbers with other numbers that are close and easy to compute with mentally.. 5.NBT.4. Remember This:. “Look . right. next door-if it’s 5 or . more. (5,6,7,8 or 9) . raise (increase by one). the score. . If it’s 4 or . less. (4,3,2,1 or 0) let it rest.. Rounding Decimals to the Thousandths. LG: Demonstrate the ability to round numbers to the nearest ten. th. , hundred. th. , and thousand. th. Kid friendly: Show that you can round numbers to tenths, hundredths, and thousandths. Definitions. When rounding decimals it is first necessary to . identify . the place value you are rounding to. . The . digit that follows will tell you whether you should round up or leave the digit the same.. If . Creator: . Jamin. Jones. Class CEP: 811. Date: October 29, 2012. Objectives. You will be able to…. Understand place value up to the tenths and hundredths. Round numbers to the nearest tenth and hundredth. This resource provides animated demonstrations of the mathematical method.. Check animations and delete slides not needed for your class.. There are 400 people in my village.. Last year I earnt £23,000..