Lesson 2

Collect Pet Data

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X
  1. 10
  2. 3
  3. 10
  4. 8
  5. 11
  6. 2
  7. 11
  8. 7
  9. 10
  10. 5
  11. 10
  12. 1
  13. 11
  14. 6
  1. Possible response: If I know 6 + 5 = 11, I can think of fact families.
    11 − 5 = 6.

Ongoing Assessment

Use DPP item F to assess students' abilities to determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Group C [E10].

F. Add and Subtract

  1. 3 + 7 =
  2. 10 − 7 =
  3. 8 + 2 =
  4. 10 − 2 =
  5. 9 + 2 =
  6. 11 − 9 =
  7. 7 + 4 =
  8. 11 − 4 =
  9. 5 + 5 =
  10. 10 − 5 =
  11. 1 + 9 =
  12. 10 − 9 =
  13. 6 + 5 =
  14. 11 − 5 =
  1. How can you use 6 + 5 to solve 11 − 5?