Lesson 4

Square Number Patterns

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Discuss students' estimation strategies.

    1. 715
    2. .0715
    3. 7150
    1. 32.9
    2. 329
    3. 9.44
  3. Possible strategy:

    230.3 is close to 210.
    210 ÷ 7 = 30.
    The answer will be more than 30.
  4. Possible response for 1A:
    10 × 65 = 650
    650 + 65 = 715

N. More Practice

Solve the following problems using paper and pencil or mental math. Use a separate sheet of paper. Estimate to be sure your answers are reasonable. Use the Multidigit Multiplication Strategies Menu and the Division Strategies Menu in the Student Guide Reference section.

  1. A. 11 × 65 =

    B. .11 × .65 =

    C. 110 × 65 =
  2. A. 230.3 ÷ 7 =

    B. 2303 ÷ 7 =

    C. 66.08 ÷ 7 =
  1. Explain your estimation strategy for Question 2A.


  2. Choose a problem from Question 1 and explain how you can solve it using mental math or a few quick notes.