Estimating Sums and Differences of Fractions

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

Multi-Step

Amanda picked 3/5 pound of blueberries at her local farm yesterday. She used 3/8 pound of blueberries. Today she picked 4/5 pound of blueberries. About how many pounds of blueberries does Amanda have now?

• 1/5 pound

• 1/2 pound

• 1 pound

• 1 1/2 pound

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

On Saturday, the scouts hiked 4/5 mile up the mountain. On Sunday, they hiked 1/4 mile up the mountain. About how far did the scouts hike up the mountain in all?

• 1/ 2 mile

• 1 mile

• 1 1/2 miles

• 2 miles

Estimate 1/5

• 0
• 1/2
• 1

Estimate and Solve 2/9 + 7/8

• 0
• 1/2
• 1

Estimate
4/5 + 5/9

• 1
• 1 1/2
• 2
• 0

Estimate
9/11 - 5/12

• 1
• 1 1/2
• 1/2
• 2

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

Which sum is greatest? Use estimation to decide.

• 2/7 + 3/8

• 1/10 + 3/8

• 1/6 + 1/8

• 2/9 + 1/8