Lesson 3

Thousands, Hundreds, Tens, and Ones

Est. Class Sessions: 1–2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Students use mental math strategies to solve subtraction facts in Group 6.

  1. 20
  2. 40
  3. 600
  4. 60
  5. 30
  6. 50
  7. 9
  8. 90
  1. 80 − 47 = 33. If 80 − 50 = 30, then my answer is 33 because 47 is three less than 50, which means my answer will be 30 + 3.

G. More Subtraction

Solve these problems using mental math. Write only the answer.

  1. 60 − 40 =
  2. 60 − 20 =
  3. 800 − 200 =
  4. 80 − 20 =
  5. 80 − 50 =
  6. 80 − 30 =
  7. 12 − 3 =
  8. 120 − 30 =
  1. Use Question E to solve 80 − 47 =