Lesson 8

Slides, Flips, and Turns

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Refer students to the strategies menus in the Student Guide Reference section.

  1. 241
  2. 1792
  3. 4280
  4. 1422
  5. 611
  6. 1416
  1. Responses will vary. Possible responses for
    A: 600 − 400 = 200
    B: 7 × 25 = 175
         175 × 10 = 1750
  2. Possible response: the problem needs no regrouping.
    900 − 300 = 600
    25 − 14 = 11
    600 + 11 = 611

W. Can You Compute with Big Numbers?

Solve the following problems using mental math or a paper-and-pencil method.

  1. Choose one subtraction question and one multiplication question and show how you estimate to tell whether your answer makes sense.
  2. Show how you can solve Question E using mental math.