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UNIT 7
CHAPTER 28
Lesson 28-1
 
 
 
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CHAPTER 28 EXPLORING 2-DIGIT ADDITION AND SUBTRACTION
Lesson 28-1 HANDS ON Add and Subtract Tens
 
 

 Add or subtract. Use .

6.
Adding and subtracting using blocks





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Reasoning
  
15.Draw what was added. Complete the number sentence.



  
Your child added and subtracted multiples of 10.
Activity:  Say the number 70 . Ask your child to count on 2 tens. Then ask your child to count back 2 tens.

 

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