multiplying multi-digit numbers by 1-digit numbers

Juan rides his bike 97 miles to and from school each month. How can you use compensation to find the number of miles he rode in 6 months?

• 97 is close to 100, so multiply 6 × 100 and then add 6 × 3.

• 97 is close to 100, so add 6 + 100 and then multiply by 6 + 3.

• 97 is close to 100, so add 6 + 100 and then add 6 × 3.

• 97 is close to 100, so multiply 6 × 100 and then subtract 6 × 3.

Mr. Alcazar bakes cookies in batches of 60 and batches of 90. If he bakes 6 batches of 60 cookies,

how many cookies does he bake?

• 60 cookies

• 90 cookies

• 360 cookies

• 3600 cookies

The Ulis family spends $1,632 a year for gym memberships. How much does the family spend in 4 years?

• 5,528

• 6,338

• 6,528

• 6,428

Tags

CCSS.5.NBT.B.5

Select the expression that could NOT be used to find the area of a running track

that is 1,243 feet long and 8 feet wide.

• 8 + (1,000 + 200 + 40 + 3)

• 8 × 1,243

• 1,243 + 8

• 8 × (1,000 + 200 + 40 + 3)

In one week, the Pancake House sells 1,084 waffles. How many waffles are sold in 5 weeks?

• 5,370

• 5,270

• 5,300

• 6,370

Tags

CCSS.5.NBT.B.5

Estimate to check if the product is reasonable.

6 × 832 = 4,992

• No. It is not a reasonable product.

• Yes. It is a reasonable product.

Which expression shows how to use breaking apart to find 7 × 593?

• (7 × 500) + (7 × 90) + (7 × 3)

• (7 × 50) + (7 × 90) + (7 × 30)

• (7 × 500) + (7 × 9) + (7 × 3)

• (7 × 5) + (7 × 9) + (7 × 3)

Dmitri earns $223 a month mowing lawns.

Which is a reasonable estimate for the amount of money Dmitri would have if he saves

all the money he earns for 4 months?

• $1000

• $700

• $400

• $800

Tags

CCSS.4.NBT.B.5

Mr. Manet would like to purchase a guitar for each of his 4 grandsons and 1 granddaughter.

The guitars each cost $268. Which is the best estimate of the total cost of the guitars?

• $1000

• $1800

• $1500

• $2000

Tags

CCSS.4.NBT.B.5

Solve using any algorithm. 6,493 X 8 =

• 51,499

• 51,944

• 48,944

• 51,244