Lesson 3

Modeling Division

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. 42 ft. × 23 ft. = 966 sq. ft.
  2. 20 ft. × 23 ft. = 460 sq. ft.
  3. 506 sq. ft.;
    Possible responses:
    966 − 460 = 506 sq. ft.
    or, 42 − 20 = 22 ft. left to paint.
    22 ft. × 23 ft. = 506 sq. ft.

E. Finding Area

Mr. Washington is painting the basement floor. He made a drawing of the floor.

  1. Find the area of the whole basement floor. Write a number sentence to show how you know.
  2. Mr. Washington started painting by the windows and painted 20 feet into the room before lunch. How many square feet did he paint before lunch? Write a number sentence to show how you know.
  3. How many square feet were left to paint after lunch? Show or tell how you know.