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UNIT 3
CHAPTER 10
Lesson 10-3
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CHAPTER 10 SUBTRACTION STRATEGIES
Lesson 10-3 Estimate Differences
Estimate Differences
Name ___________________________
You can estimate differences. Estimate. Will 9 - 3 be more than 9 or less than 9?
Think: When you subtract a number other than 0 from 9, the difference is less than 9.
Estimate the difference. Subtract to check.
Use the number line.
1.
10 - 1
2.
more than 7
less than 7
3.
more than 5
less than 5
4.
more than 6
less than 6
5.
How can you estimate if 10 - 3 is more than 10 or less than 10?
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