Topic 3 & 4 - Multiplying Decimals

Multiplying Decimals

100

23.5x68=

159.8

200

2.37 x 17 =

40.29

300

1738 x .67 =

1164.46

400

291 x .276=

80.316

500

562 x 85.3=

80.316

Multiplying by 10, 100, 1,000

100

.84 x 100 = 

84

200

9.6 x 10=

96

300

.456 x 100= 

45.6

400

.987 x 1,000 =

987

500

4.26 x 10 = 

42.6

Word problems

100

Mrs. Baldridge has 65 pairs of shoes. Ms. Hudson has 4 times that amount. How many pairs of shoes does Ms. Hudson have?

65 x 4 = 260

200

I have an array. It is on a hundredth grid. The top has 5 squares filled in. The side has 6 squares filled in. Write an equation and solve it. 

.06 x .05 = .30

300

When we did Apple Butter, Mrs. Baldridge bought 12 bags of apples. The apples were $5.49 each. How much did Mrs. Baldridge spend on apples? 

Ms. Hefner split it with her. ABOUT how much money did Ms. Hefner pay her?

12 x 5.49 = 65.88

Ms. Hefner paid her about $30.

400

My mom's car payment is $563 a month. She has a 4 year loan (48 months) . How much was her car?

Show your work. 

563 x 48 = $27,024

500

Thanksgiving turkeys are .97 a pound. The turkey Lexi got for Friendsgiving was 15 pounds. How much was the turkey?

$14.55

Equivalent Equations

100

.003 x .05 is the same as 

3/1,000 x 5/100 =

200

4/ 100 x 5/100 is the same as 

.04 x .05 = 

300

.7 x .8 is the same as 

7/10  x 8/10

400

6/1000 x 3/10

.006 x .3 = 

500

.55 x .34 is the same as 

55/100 x 34/100 = 

Estimating & Powers of 10

100

Estimate: 118 x 48 = 

120 x 50 = 6,000

200

Estimate: 23 x 41 = 

20 x 40 = 80

300

6.3 x 10^{4  =}

63,000

400

5.4 x 10^{3 =}

5,400

500

8.2 x 10^{5 =} 

820,000