Decimal Multiplication- Module 4 Review

Decimals & Powers of Ten

100

Solve:

2.3 x 10¹ =

23

200

Solve:

12.4 x 10 =

124

300

Solve:

0.749 x 10² = 

74.9

400

Solve:

10³ x 0.84 = 

840

500

Solve:

10⁴  x 0.03843 = 

384.3

Simple Multiplication

100

Solve:

1.4 x 3 =

4.2

200

Solve:

4 x 3.5 = 

14

300

Solve:

8.23 x 6 =

49.38

400

Solve:

42.6 x 9 = 

383.4 

500

Solve:

18 x 27.48 = 

494.64

Estimate the Product

100

Round to the nearest WHOLE NUMBER and estimate the product.

4.9 x 3.7 =

Answer: 20

(5 x 4)

200

Round to the nearest WHOLE NUMBER to estimate the product.

3.1 x 9.8 =

Answer: 30

(3 x 10)

300

Round to the nearest WHOLE NUMBER to estimate the product.

10.03 x 16.2 =

Answer: 160

(10 x 16)

400

Round to the nearest TENTH and estimate the product:

3.44 x 2.19 =

Answer: 7.48

(Rounded: 3.4 x 2.2)

500

Round to the NEAREST TENTH to estimate the product:

14.273 x 24.0924 =

Answer: 344.63

Rounded (14.3 x 24.1)

Multiply two Decimals

100

Use the standard algorithm to solve for the product:

12.3 x 3.2 =

39.36

200

Use the standard algorithm to solve for the product:

28.1 x 6.2 =

174.22

300

Use the standard algorithm to solve for the product:

34.2 x 8.7 =

297.54

400

Use the standard algorithm to solve for the product:

16.23 x 4.3 =

69.789

500

Use the standard algorithm to solve for the product. Round your ANSWER to the nearest hundredth.

8.52 x 2.19 = 

Answer: 18.66

(18.6588 rounds to 18.66)