Lesson 1

The TIMS Candy Company

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
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TIMS Challenge

This challenge can serve as a Problem of the Week. Students must show or tell how they solved each and sketch the rectangles. Since students can use square-inch tiles and drawings, the problems are accessible to all students. Students may use drawings, words, or number sentences to show their thinking. Remind them to use the Expectations on the Math Practices page to help them.

    1. Area is 81 square inches. Strategies will vary.
    2. Perimeter is 36 inches. Possible strategy:
      9 + 9 + 9 + 9 = 36 in.
  2. Area is 9 square inches. Possible strategy: I used sq. in. tiles and built squares until I found a square with a perimeter of 12 in.
  3. Area is 196 square inches. Possible strategy: 56 ÷ 4 = 14, so each side is 14 inches; 14 × 14 = 196 square inches
  4. Perimeter is 80 inches. 20 × 20 = 400, so each side is 20 inches. Strategies will vary.

D. Area and Perimeter

  1. Make or imagine a rectangle with 9 rows of square-inch tiles. Each row has 9 tiles in it.

    1. What is the area of this rectangle? Show or tell how you know.
    2. What is the perimeter?
      Show or tell how you know.
      Make a sketch of this rectangle.
  1. Make or imagine a square with a perimeter of 12 inches. What is the area of this square? Make a sketch of this square.
  2. Make or imagine a square with a perimeter of 56 inches. What is the area of this square? Make a sketch of this square.
  3. Make or imagine a square with an area of 400 square inches. What is the perimeter of this square? Make a sketch of this square.