Multiply Decimals & Whole Numbers
Multiply Decimals by power of 10
Multiply Decimals & Decimals
Estimating products of decimals
Mystery Decimal math
100

Solve:

7 x 2.4

16.8

100

12.1 x 102 =

1210

100

Solve:  

0.2 x 0.8

0.16

100

Estimate the product by rounding

7.73 x 9.16 =

8 x 9, about 72


100

6.5 x 102 =

6.5 x 103 =

6.5 x 104 =

650

6500

65000

200

Solve:

5 x 0.06

0.3

200

9.563 x 103 =

9,563

200

Solve: 

 0.4 x  5.9 =

2.36

200

Estimate the product by rounding

6.23 x 3.87 =

6 x 4, about 24

200

Find the missing power of 10:

0.12 x ? = 120

103

300

Solve:

20 x 0.14

2.8

300

59.8 x 103 =

59,800

300

Solve: 

 0.8 x 0.44

0.352

300

Estimate the product by rounding

40.55 x 7.89=

40 x 8, about 320, or

41 x 8. about 328

300

2.5 x 103 =

2.5 x 105 =

2.5 x 102 =

2500

250000

250

400

Solve: 

3.6 x 94

338.4

400

0.142 x 105 =

14,200

400

Solve: 

  12.7 x 2.6 =

33.02

400

Estimate the product by rounding

19.91 x 28.75 =

20 x 30, about 600, or

20 x 29, about 580

400

Solve and answer.

Is 1.37 x 0.2 less than 1 or greater than 1.

0.264 Less than 1

500

Solve:

0.44 x 53

23.32

500

0.06 x 106 =

60,000

500

Solve: 

 0.27 x  0.7

.189

500

Estimate the product by rounding

24.09 x 19.57

24 x 20, about 480 or

20 x 20, about 400

500

A teacher bought 15 rulers, each ruler cost 0.85 cents. She gave the cashier a $20.  What was the amount of change she should get back?

$7.25

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