Lesson 6

Joe the Goldfish

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Students use mental math strategies to solve subtraction problems in Groups 7 and 8.

  1. 14
  2. 9
  3. 8
  4. 12
  5. 4
  6. 7
  7. 13
  8. 9
  9. 8
  10. 13
  1. Possible strategy: I knew I was close to a double. 6 + 6 = 12 and 7 + 6 = 13. So 13 − 7 = 6.

Ongoing Assessment

Use DPP item S to assess students' ability to use strategies to subtract, including using doubles and thinking addition, for facts in Groups 7 and 8. [E9]

See the Letter Home for targeted practice.

S. More Subtraction Strategies

Do these problems in your head. Write only the answers.

  1. − 7 = 7
  2. 17 − = 8
  3. 18 − = 10
  4. − 5 = 7
  5. 7 − = 3
  6. 15 − = 8
  7. − 7 = 6
  8. 18 − = 9
  9. 14 − = 6
  10. − 6 = 7
  1. Explain your strategy for Question G.