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UNIT 5
CHAPTER 18
Lesson 18-6
 
 
 
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CHAPTER 18 SUBTRACTION STRATEGIES AND FACTS TO 18
Lesson 18-6 ALGEBRA: PROBLEM SOLVING: STRATEGY Choose the Operation
 
 

  
Circle add or subtract. Write a number sentence to solve.

1.

14 bees are in the garden. 8 bees fly away. How many bees are left?
____ ____ ____
2.

9 birds are in a tree. 4 birds are in a bush. How many birds are there in all?
____ ____ ____
3.

15 ladybugs are by a rock. 9 ladybugs fly away. How many ladybugs are left?
____ ____ ____

  
Your child solved problems by choosing the operation to write number sentences.
Activity:  Put 9 pennies on the table. Then add 3 more. Ask your child to write a number sentence. Then ask your child whether he or she added or subtracted to solve the problem.

 

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