Lesson 4

Searching the Forest

Est. Class Sessions: 4

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Encourage students to use the Addition and Subtraction Strategies Menus in the Student Guide Reference section.

  1. 194
  2. 27
  3. 30
  4. 62
  5. 625
  6. 547
  7. 429
  8. 8700
  9. 498
  10. Possible response: I thought 846 − 300 = 546. I added one to 546 since 300 is one more than 299.

O. Practice Mental Math Strategies

Use the Addition and Subtraction Strategies Menus in the Student Guide Reference section.

    1. N − 155 = 39
    2. N = ____________
    1. 100 − N = 73
    2. N = ____________
    1. 88 − 58 = N
    2. N = ____________
    1. N + 66 = 128
    2. N = ____________
    1. 250 + N = 875
    2. N = ____________
    1. 846 − N = 299
    2. N = ____________
    1. 321 + N = 750
    2. N = ____________
    1. 2378 + 6322 = N
    2. N = ____________
    1. 1000 − N = 502
    2. N = ____________
  10. Show or tell your strategy for solving Question F. What did you do in your head?