Lesson 2

Field Trip

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

This DPP item can be used to practice the subtraction facts in Group 1. Remind students to use the strategies like using tens or thinking addition as they practice these facts.

  1. 2
  2. 3
  3. 5
  4. 3
  5. 4
  6. 6
  7. 9
  8. 9
  9. 9
  1. Possible response: I know that 12 − 9 = 3, so 12 tens − 9 tens is 3 tens or 30.

C. Subtraction Facts: Group 1

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

  1. 12 − 10 =
  2. = 13 − 10
  3. 15 − 10 =
  4. 12 − 9 =
  5. = 13 − 9
  6. = 15 − 9
  7. 19 − 10 =
  8. 13 − 4 =
  9. 15 − 6 =
  1. Use your strategy for solving Question D to solve 120 − 90 = .