Easy Decimals
Multiply by 10 or 100
Word Problems
Estimation
Challenge Problems
100

0.4 × 3

1.2

100

3.4 × 10

34

100

A notebook costs $5.50. You buy 9 notebooks.
How much do you spend?

$49.50

100

Estimate: 2.9 × 4.1

about 12

100

75.89 x 3.257

247.17373

200

1.5 × 4

6

200

0.56 × 10

5.6

200

Each piece of ribbon is 1.5 meters long. You cut 4 pieces.
How many meters of ribbon do you use?

6 Meters

200

Estimate: 5.2 × 3.7

about 20

200

18.2 x 265.23

4827.186

300

2.3 × 2

4.6

300

4.3 × 100

430

300

A bottle of juice costs $3.99. You buy 5 bottles.
How much do you spend?

$19.95


300

Estimate: 1.8 × 6.3

about 12

300

36.5 x 21.82

796.43

400

0.8 × 6

4.8

400

0.78 × 100

78

400

A bag of apples weighs 2.4 pounds. You buy 5 bags.
What is the total weight?

12 pounds 

400

Estimate: 3.6 × 2.2

about 8

400

800.2 x 16.7

13363.507

500

3.2 × 24

76.8

500

6.25 × 10

62.5

500

Each ticket costs $13.99. A family buys 8 tickets.
How much do they spend?

$111.92


500

Estimate: 4.7 × 5.1

about 25

500

125.78 x 52.65

6622.317