Powers of 10
Estimating
Multiplication- Decimal x Whole Number
Multiplication- Decimal x Decimal
Word Problems (double the points)
100

42.3 X 10 = 

423

100

2.15 x 16 = 

2 x 20 = 40

100

9.8 X 2 =

19.6

100

0.3 x 0.7 = 

0.21 

100

Jimmy bought stamps from the Post Office. Each stamp costs $0.55 each. If he bought 24 stamps, how much money will spend? 

$13.20 

(13.2)

200

0.678 x 100 =

678

200

1.05 x 82 = 

1 x 80 = 80

200

0.56 x 32 = 

17.92

200

0.33 x 0.8 = 

0.264

200

Aaron went to the store to buy eggs. He bought 3 cartons of eggs. There are 12 eggs in each carton. How many eggs did he buy? 

36 eggs 

300

563.7 x 10

56,370

300

3.2 x 184 =

3 x 200 =600 

300

2.54 X 12 = 

30.48

300

4.5 x 0.08 = 

0.36 

300

One bag of dog food weights 12.8 pounds. The pet store receives 25 bags of dog food a week. How much does 25 bags weigh? 

320 pounds 

400

94.6 x 103 = 

94,600

400

0.54 x 167 = 

1 x 200 = 200 

400

50 x 0.914 = 

45.7 

400

1.18 x 0.6 = 

0.708 

400

April went to Pizza Pizzazz and bought two pizzas. Each pizza costs $12.45. How much did she spend? 

$24.90

(24.9)

500

0.629 x 10= 62.9

2

500

104 x 0.33 = 

100 x 0.30 = 30

500

64.2 x 12 = 

770.4

500

14.3 x 0.8 = 

11.44

500

A club is hosting a fundraiser, each ticket costs $4.55. How much money would you need for your group to attend the fundraiser? 

3 - $13.65 

4 - $18.20 (18.2) 

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