Lesson 6

Problem Solving with Area

Est. Class Sessions: 1–2

Daily Practice and Problems

Teacher Notes
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TIMS Bit

Use Bit U to practice the multiplication facts for the 9s.

  1. 675 cookies
  2. First I divided 75 into 70 + 5, then since I know 7 × 9 = 63, 70 × 9 = 630. I know 5 × 9 = 45, so I added 630 + 45 to find the total number of cookies.

U. Cookies

There are 9 boxes of cookies. There are 75 cookies in each box.

  1. Use a mental-math strategy to figure out how many cookies there are in all 9 boxes.
  2. Describe the strategy you used.