NAME ____________________________________ DATE __________________

ACTIVITY

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Problems with an Unknown Change

Solve each problem. Show your work. Write an equation.

  • 1 Sally had 34 star stickers. She went to Sticker Station and bought some more star stickers. Now Sally has 54 star stickers. How many stickers did Sally buy at Sticker Station?

  • 2 Franco had 45 puppy stickers. He gave some of his puppy stickers to his sister. Now Franco has 30 puppy stickers. How many puppy stickers did he give to his sister?


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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Coins, Number Strings, and Story Problems Unit 2 Attributes of Shapes and Parts of a Whole Unit 3 How Many Stickers? How Many Cents? Unit 4 Pockets, Teeth, and Guess My Rule Unit 5 How Many Tens? How Many Hundreds? Unit 6 How Far Can You Jump? Unit 7 Partners, Teams, and Other Groups Unit 8 Enough for the Class? Enough for the Grade?