Estimation

Mathematics, Grade 3

Estimation

Study Guide

Assign Google Classroom Weblink

Estimation

Flash Cards

Assign Edit Save Google Classroom Weblink

Estimation

Quiz

Assign Edit Save Google Classroom Weblink

Estimation

Worksheets

Assign Google Classroom

Estimation

Games

Assign Edit Save Google Classroom Weblink

Study Guide Estimation Mathematics, Grade 3

1
/
2
ESTIMATION What Is Estimation? When you make an estimate, you are making a guess that is approximate. This is often done by rounding. How to Estimate: When estimating, you will often need to round off the numbers with which you are working. For example: There are 148 gumballs in three jars. If the jars have about the same amount, estimate how many gumballs are in each jar? To solve this problem: o First round 148 to 150. 150 is an easier number to work with when estimating. o Now take 150 and divide it into three parts. Since 50 + 50 + 50 = 150, then there are approximately 50 gumballs in each jar. When estimating to add or subtract, round each number before adding or subtracting. For example: To estimate the sum of 23 and 17: o First round 23 and 17 to the nearest ten. 23 rounded to the nearest ten is 20 17 rounded to the nearest ten is 20 o Then add 20 and 20 together. 20 + 20 = 40 To estimate the difference between 32 and 14: o First round 32 and 14 to the nearest ten. 32 to the nearest ten is 30 14 to the nearest ten is 10 o Then subtract 10 from 30. 30 10 = 20 © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Try This! Estimate the sum of the following. 24 + 37 = ______ 62 + 19 =______ 31 + 46 = ______ 18 + 48 =______ Estimate the difference of the following. 48 31 = ______ 52 29 = ______ 88 53 = ______ 76 20 = ______ © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.