Multiply by Multiples
of 10 and 100
Use Rounding
to Estimate
Use an Array/Partial Products to Solve
Use an Area Model/Partial Products to Solve
Word Problems
100

6 x 50

300

100

493 x 3

500 x 3 = 1,500

100

75 x 5

375

100

43 x 8

344

100

Lola packed 12 cookies in her lunchbox. Her best friend packed twice as many cookies. How many cookies does her best friend have?

Her best friend has 24 cookies.
200

30 x 9

270

200

707 x 4

700 x 4 = 2,800

200

214 x 7

1,498

200

57 x 9

513

200

James ran a mile in 15 minutes. Matt took three times as long to run the mile. How long did Matt take?

Matt took 45 minutes to run a mile.

300

400 x 5

2,000

300

8 x 7,632

8 x 8,000 = 64,000

300

253 x 4

1,012

300

215 x 7

1,505

300

Mia has a collection of 34 dolls. A toy store's warehouse has 5 times as many dolls. How many dolls does the warehouse have?

The warehouse has 170 dolls.

400

5 x 8,000

40,000

400

6 x 8,166

6 x 8,000 = 48,000

400

3 x 121

363

400

3,261 x 4

13,044

400

Annie has 6 albums of stamps in her stamp collection. Each album contains 440 stamps. How many stamps does Annie have in her collection?

Annie has 2,640 stamps in her collection.

500

7 x 9,000

63,000

500

9,379 x 5

9,000 x 5 = 45,000

500

1,341 x 7

9,387

500

2,239 x 5

11,195

500

Sam drives a truck from Nevada to California and back each day. He drives 270 each way. How many miles does he drive in one week?

Same drives 3,780 miles in one week.

270 miles x 2 = 540 miles

540 miles x 7 days in a week = 3,780