Lesson 4

Estimating with Multiplication

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Students were introduced to the game Operation Target in Unit 7 Lesson 1. Students may refer back to their Student Guide pages.

    1. 50
    2. 400
    3. 9
    4. 13
  2. 84 × 65 = 5460
  3. 1; 8 + 4 − 5 − 6

L. Order of Operations

Irma and Jacob are playing Operation Target with a new rule: making two-digit numbers with the digits is allowed as in Question 1D.

  1. They recorded these number sentences using 4, 5, 6, and 8. Find the numbers they made.
    1. 4 + 6 + 5 × 8 =
    2. 8 × (6 + 4) × 5 =
    3. 6 − 8 ÷ 4 + 5 =
    4. 5 + 48 ÷ 6 =
  1. Keeping the new rule in mind, what is the largest whole number you can make with 4, 5, 6, 8 and one or more of the four operations (+, −, ×, ÷)?
  2. What is the smallest whole number you can make?