2.5 Estimating with Two Digit Divisors

A meteoroid travels 18 miles per second and is 2,863 miles away from the moon. Estimate how long it will take the meteoroid to reach the moon.

• 120 seconds

• 200 seconds

• 150 seconds

• 280 seconds

Tags

CCSS.5.MD.A.1

Apply

A playground is 5,583 feet away from Jake’s house. Jake runs 17 feet per second. Which is the best estimate of the amount of time it will take Jake to run to the park?

• 5,000 ÷ 20 = 260 seconds

• 6,000 ÷ 20 = 300 seconds

• 6,000 ÷ 10 = 600 seconds

• 5,000 ÷ 10 = 500 seconds

Tags

CCSS.6.NS.B.2

CCSS.6.RP.A.2

CCSS.6.RP.A.3

Multi-Step

At an orchard, 486 green apples are to be organized into 12 green baskets, and 633 red apples are to be organized into 31 red baskets. Use estimation to decide which color basket has more apples. About how many apples are in each basket of that color?

• red basket, 50 apples

• green basket: 20 apples

• red basket, 20 apples

• green basket: 50 apples

Tags

CCSS.5.NBT.B.6

CCSS.5.NF.B.3

Anik built a tower of cubes. It was 594 millimeters tall. The height of each cube was 17 millimeters. About how many cubes did Anik use?

• 10

• 300

• 30

• 16

Tags

CCSS.4.NBT.B.5

Use compatible numbers to estimate.

7,233 ÷ 84

• 8500 ÷ 85 = 100

• 7,200 ÷ 90 = 80

• 7,200 ÷ 80 = 90

Tags

CCSS.4.NBT.B.6

Use compatible numbers to estimate.

568 ÷ 34

• 570 ÷ 30 = 19

• 600 ÷ 30 = 20

• 500 ÷ 50 = 100

Tags

CCSS.4.NBT.B.6

Use compatible numbers to estimate.

4,479 ÷ 89

• 4,500 ÷ 90 = 50

• 4,400 ÷ 90 = 50

• 4,000 ÷ 100 = 40

Tags

CCSS.4.NBT.B.6

Use compatible numbers to estimate.

1,847 ÷ 24

• 2500 ÷ 25 = 100

• 1,850 ÷ 20 = 92.5

• 1,800 ÷ 20 = 90

Tags

CCSS.4.NBT.B.6

Alec needs to save $376. He plans to rake fall leaves for $12 per lawn. Using compatible numbers, write an estimate that shows the number of lawns he will need to rake.

• $400÷$10

• $370÷$12

Tags

CCSS.4.NBT.B.6

Mr. Rodriguez’s construction company built an office building that is 1,848 feet tall. Each floor of the building is 14 feet high. About how many floors are in the building? Write an estimate.

• 1850 ÷ 10 = 185

• 1,800 ÷ 15 = 120

Tags

CCSS.5.NBT.B.6