Lesson 5

Subtraction Facts Strategies

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Students should compare solutions. Some may need to check their work on a calculator.

Answers will vary.

Possible responses:

  1. 6 + 6 + 6 + 6 =
  2. 6 + 6 + 5 + 6 =
  3. 50 − 30 + 50 − 30 =

S. 1 and 2 Are Broken

The “1” key and the “2” key are broken on the calculator. List the keys you would press to do these problems. You do not have to fill all the boxes.

  1. 12 + 12
  2. 12 + 11
  3. 20 + 20