Lesson 8

Subtraction Strategies

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Have 20 connecting cubes and number lines readily available. Encourage students to share their strategies and number sentences.

  1. 3 balls; possible number sentences include:
    6 + 3 = 9
    9 − 6 = 3
  2. 10 hats; possible number sentences include:
    6 + 4 = 10
    10 − 4 = 6
    10 − 6 = 4

Z. Clowning Around

  1. The clown threw 9 balls into the crowd at the circus. Six balls were caught. How many balls were not caught? Write a number sentence.

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  2. The clown took off 4 hats from his head. He still had 6 hats on his head. How many hats did the clown have on his head to start? Write a number sentence.

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