Lesson 10

Add Fractions

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. More than 1/2
  2. More than 1
  3. More than 1/2
  4. Less than 1
  5. Possible response: If you add 1/4 + 1/8 the answer will be 3/8. It takes 4/8 to equal 1/2. Since 1/6 is larger than 1/8, when you add 1/6 to 3/8 it will be larger than 1/2.

II. Estimating Sums

Decide which is the best estimate for each sum.

  1. Is 1/8 + 1/10 + 3/5 more than 1/2 or less than 1/2? _________________________
  2. Is 2/3 + 1/2 + 1/3 more than 1 or less than 1? _________________________
  3. Is 1/4 + 1/6 + 1/8 more than 1/2 or less than 1/2? _________________________
  4. Is 1/3 + 1/4 + 1/8 more than 1 or less than 1? _________________________
  5. Explain your reasoning for Question 3.