Lesson 1

Investigating Perimeter and Area

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

If needed, provide rulers by preparing the Centimeter and Inch Ruler Master.

  1. Answers will vary. Frank must have measured in centimeters. 15 inches is way too large to be a person's hand, especially a fourth-grader's.
  2. 15 inches
  3. Answers will vary. Possible response: a pen
  4. Answers will vary. Possible responses: width of a small TV; width of a small window

C. Units

  1. Frank measured his hand length. He forgot to include the unit in his measurement. He just wrote “15.” Do you think he measured in centimeters or inches? Why do you think so?
  2. Which is longer, 15 cm or 15 inches?
  3. Find an object that is about 15 centimeters long.
  4. Find an object that is about 15 inches long.