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Chapter 3 L3-4 Notes: Estimating Sums & Differences
Rounding Estimate by rounding each decimal to the nearest whole number, then add the digits. Example:60.7 + 68.5
On Your Own… a. 49.59 + 16.22 = b. $41.59 - $19.72 = c. 2.33 + 4.88 + 5.88 =
Front-End Estimation To use front-end estimation, add or subtract the front digits. (Front digits are digits before the decimal). Example: 34.6 + 55.3
On Your Own… a. 22.35b. 5.45c. $37.92 - 11.14 + 0.57 - $21.62
Clustering Estimate by rounding a group of close numbers to the same number. Example: 72.50 68.50 69.75 71.75 +
On Your Own… a. 6.99 + 6.59 + 7.02 + 7.44 b. $3.33 + $3.45 + $2.78 + $ 2.99 c. 5.45 + 5.3948 + 4.7999
3-2 Estimating Decimals Learn to estimate decimal sums, differences, products, and quotients.
Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.
Chapter 3, Section 2, Page 98 “Estimating Decimals”
3-1 Estimating Fractions and Mixed Numbers A.) Estimating sums and differences of fractions One way to estimate sums/differences of fractions is to round.
Rounding Decimals Unit 3.2 Pages
© 2007 M. Tallman. Look right next door. 3. Find your number. 7 Round to the nearest one (units). 4 Step 1: Circle the digit in the place that you must.
Section 2-2 Problem Solving Using Estimation Strategies Page 54 in your book.
5-Minute Check Round to the nearest whole number
Estimating Sums and Differences
Rounding Review Copyright © 2009 Kelly Mott.
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 1 The Whole Numbers.
3, Good Afternoon! Today we will learn about
Lesson 5 -1:. A benchmark is a number that is easy to use when you estimate. When estimating the sums and differences of fractions, we use the benchmarks.
Step 2: Circle the number to the right of the underlined decimal place Rounding Decimals.
How to round a number with two decimal places to the nearest tenth For more maths help & free games related to this, visit:
Commutative Property of Addition 2+3 = 3+2 *This property states you can add two numbers in any order!
Estimating Sums to the Nearest 10 and 100
Decimals (Day 1) Place Thousands Hundreds Tens Ones . Tenths
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