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UNIT 7
CHAPTER 27
Lesson 27-6
 
 
 
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CHAPTER 27 ADDITION AND SUBTRACTION TO 20
Lesson 27-6 ALGEBRA Addition and Subtraction Patterns
 
 

 Use a pattern to add or subtract.

4.

5.

6.

7.


  
Estimation
  
8.About how many  are there?
Circle your estimate.



about 20
about 30

  
Your child used number patterns to add and subtract.
Activity:  Ask your child: What is 3 + 5? Then ask: What is 13 + 5? Have your child tell you the number pattern.

 

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