Lesson 2

Partition Shapes

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X
  1. 9
  2. 8
  3. 7
  4. 6
  5. 5
  6. 4
  7. 3
  8. 2
  9. 1
  10. 0
  1. The answers decrease (go down) by 1 as the numbers subtracted increase (go up) by 1.

F. Subtraction Patterns

  1. 9 − 0 =
  2. 9 − 1 =
  3. 9 − 2 =
  4. 9 − 3 =
  5. 9 − 4 =
  6. 9 − 5 =
  7. 9 − 6 =
  8. 9 − 7 =
  9. 9 − 8 =
  10. 9 − 9 =
  1. Describe the patterns you see. Why does this happen?