Standard Algorithm
Estimate
Area Model
Box Method
Word Problems
100

38 x 20 

760
100

49 x 72 

3,500

100

58 x 44 

2,552

100

12 x 14 

168

100

A flashlight requires 2 batteries to function. How many batteries in all would 7 such flashlights require?

14 batteries

200

94 x 30 

2,820

200

36 x 72 

2,592

200

22 x 48 

1,056

200

27 x 65 

1,755

200

A CD contains 4 music tracks. How many music tracks would 8 such CDs contain?

32 music tracks

300

67 x 21 

1,281

300

55 x 24 

1,000

300

45 x 34 

1,530

300

69 x 45 

3,105

300

Norah uses an ounce of butter to bake 9 cookies. How many cookies can she bake with 8 ounces of butter?

72 cookies 

400

86 x 36 

3,096

400

13 x 62

600

400

73 x 92 

6,716

400

76 x 32

2,432

400

George visits a store to buy 2 ash drives. They are priced at $28 each. How much does he need to spend on his purchase?

$56
500

126 x 84 

10,584

500

53 x 87 

4,500

500
345 x 75 

25,875

500

265 x 74

12,455

500

James, a crane operator works 8-hour shifts every day. If he worked 22 days in a month, how many hours of work did he put in altogether?

176 hours

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