Lesson 2

Perimeter vs. Length Lab

Est. Class Sessions: 4

Daily Practice and Problems

Teacher Notes
X

TIMS Task

    1. 93
    2. 81
    3. 151
    4. 184
  2. Answers will vary. Possible response for A: 29 is one less than 30. Add 30 + 64 by skip counting tens. 64, 74, 84, 94. Subtract one makes 93. Possible response for D: 98 is two less than 100. 100 + 86 = 186. Subtract 2 makes 184.

L. Adding

Solve using paper and pencil or mental math.

  2. Choose one problem and show how you solved it using mental math.