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UNIT 7
CHAPTER 27
Lesson 27-4
 
 
 
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CHAPTER 27 ADDITION AND SUBTRACTION TO 20
Lesson 27-4 ALGEBRA Use Addition to Subtract
 
 

 Find each missing number.




9.

10.
11.

12.

13.

14.

15.

16.


  
Critical Thinking
  
 Draw a picture to solve.

17.Bob has 3 coins.
They are worth 40¢.
One coin is a .
What are the other coins?
_______

  
Your child learned that addition and subtraction are related.
Activity:  Have your child count 16 beads. Hide 7 in your hand. Have your child count the number of beads that are left and write . Have your child tell you the number of hidden beads. Repeat for other numbers.

 

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