Lesson 1

Compare and Order Masses

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X
  1. 17
  2. 15
  3. 17
  4. 16
  5. 14
  6. 14
  7. 15
  8. 7
  9. 18
  10. 18
  1. Answers will vary.
    A possible response:
    Nine is 1 less than 10, so 9 + 6 is 1 less than 10 + 6, or 15.

Ongoing Assessment

Use DPP item D to assess students’ fluency with the addition facts in
Group F [E12].

D. Addition Facts Practice

  1. 9 + 8 =
  2. 10 + 5 =
  3. = 10 + 7
  4. = 10 + 6
  5. 8 + 6 =
  6. 10 + 4 =
  7. = 9 + 6
  8. 16 = 9 +
  9. 10 + 8 =
  10. = 9 + 9
  1. Show or tell how the solution to Question D can help you solve Question G.