Lesson 9

Paper-and-Pencil Multiplication

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Task

  1. 40
  2. 2307
  3. 14
  4. 1336
  5. 20
  6. Explanations will vary. A possible response:
    300 + 20 + 4 = 324; 300 + 10 = 310.
    Counting up from 310 to 324, you get 14.

Ongoing Assessment

Use DPP Task HH to assess the following Expectation.

E1.    Show that different partitions of the same number are equal using base-ten pieces, number lines, and number sentences (e.g., 200 + 30 + 7 = 200 + 20 + 17).

Play Make a Pack in Lesson 1 as targeted practice. Activities in Lesson 3 and Lesson 7 also provide targeted practice.

HH. Finding n

Find n to make the number sentence true.

  1. 546 = 500 + n + 6
  2. 2000 + 300 + 7 = n
  3. 300 + 20 + 4 = 300 + 10 + n
  4. 1000 + 200 + 130 + 6 = n
  5. 2000 + 400 + 30 + 5 = 2000 + 400 + n + 15
  6. Explain how you solved Question 3.