Lesson 11

Subtract Fractions

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

  1. Not equal; 45 × 5 = 225; 51 + 53 + 49 + 54 = 207
  2. Equal; 1/2 + 3/4 = 5/4 or 1 1/4; 1/2 + 1/4 + 4/8 = 1 1/4
  3. Equal; 2 × 30 + 30 = 60 + 30 = 90; 3 × 30 = 90
  4. Not equal; 17 × 0 × 50 = 0; 150 × 50 = 7500

LL. Are They Equal

Study each pair of number sentences. Predict which are equivalent and circle those pairs. Check your predictions by solving each number sentence.

  1. 45 × 5 =
    51 + 53 + 49 + 54 =
  2. 1/2 + 3/4 =
    1/2 + 1/4 + 4/8 =
  3. 2 × 30 + 30 =
    3 × 30 =
  4. 17 × 0 × 50 =
    150 × 50 =