Estimating Sums and Differences of Fractions

Which of the following best describes the difference for 11/12 − 7/10 ?

• less than 1/2

• greater than 1/2

• greater than 1

• greater than 1 1/2

Mia uses 1/5 of a bag of gravel in the morning and 11/12 of a bag in the afternoon. About how much gravel does she use in one day?

• 1 bag

• 0 bags

• 1/2 of a bag

• 2 1/ 2 bags

Jake added 1/8 cup of sunflower seeds and 4/5 cup of banana chips to his sundae. Which is the best estimate of the total amount of toppings Jake added to his sundae?

• about 2 cups

• about 1 cup

• about 1 1/2 cups

• about 1/2 cup

Estimate
4/5 + 5/9

• 1

• 1 1/2

• 2

• 0

Estimate
9/11 - 5/12

• 1

• 1 1/2

• 1/2

• 2

Which sum is greatest? Use estimation to decide.

• 2/7 + 3/8

• 1/10 + 3/8

• 1/6 + 1/8

• 2/9 + 1/8

Michaela has 11/12 yard of orange fabric and 7/8 yard of green fabric. She uses 1/2 yard of each color for her sewing project. About how much fabric does Michaela have left if she combines the two colors?

• 1 yard

• 1/2 yard

• 1 1/2 yards

• 2 yards

Dustin buys 9/10 yard of striped fabric. He uses 3/8 yard. He buys 7/8 yard more. About how much fabric does Dustin have now?

• yard

• /2 yard

• 1 1/2 yards

• 2 yards

Estimate and solve.

4/9 - 1/6

• 1/2

• 1

• 1 1/2

• 0

Estimate and solve.

9/11 - 5/12

• 1

• 1 1/2

• 1/2

• 2