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UNIT 3
CHAPTER 9
Lesson 9-3
 
 
 
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CHAPTER 9 ADDITION STRATEGIES
Lesson 9-3 Estimate Sums
 
 

 Estimate the sum.

Add to check.







6.


7.
more than 10
less than 10
8.
more than 10
less than 10
9.
more than 7
less than 7

  

10.Add 9 + 3. Sam counted on like this.



Why is Sam wrong? Make it right.

  
Your child estimated sums.
Activity:  Write 8 + 2. Have your child estimate if the sum will be more than 8 or less than 8.

 

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