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Multiplying a Decimal by a Whole Number
Area and Perimeter
Multiply by 0.1 or 0.01
100
37 x 0.93
37
100
What is the product of 7 × 0.39? Use place-value blocks to help. Enter your answer in the box.
2.73
100
49 x 0.7 = ?
34.3
100
Sophia drew a rectangle in her math journal with a length of 3.6 centimeters and width of 5.7. What is the area of her rectangle?
The area is 20.52 sq cm.
100
0.01 x 11.7 =
.117
200
0.904 x 75
75
200
Kimberly buys 6 pencils at the bookstore. Each pencil costs $0.20. What is the cost of the pencils? Use place-value blocks to help.
$1.20
200
What is the product of 3.5 and 45?
157.5
200
Esther wants to build a fence around her square garden. Each side measures 17.64 feet. How much wood would she need to build her fence around her garden?
70.56
200
15.6 x 0.1 =
1.56
300
Leo has 59 bricks each measuring 0.19 m long. He lines up the bricks to make a row.
Estimate the length of Leo's row of bricks. Write an equation to show your work.
12 m; 60 x 0.2 = 12
300
Aaron buys 4 packs of gum. Each pack costs $1.19. What is the total amount Aaron spends for gum? Use place-value blocks to help.
$4.76
300
A water bottle has 16.9 fluid ounces of water. What is the total amount of water in a pack of 6 bottles?
101.4
300
Mackyle wants to put new flooring in his game room. The game room has a length of 9.8 feet and a width of 12.56 feet. How much tile would he need to buy to put a brand new floor in his game room?
123.088 sq feet.
300
35.9 x 0.1 =
3.59
400
Ms. Romero works 4 days a week at her office and 1 day a week at home. The route to Ms. Romero's office is 23.7 miles. The route home is 21.8 About how many miles does she drive for work each week? Explain how you found your answer.
About 200 miles. She drives about 24 + 22 = 46 miles each da. She drives 4 days a week. 50 x 4 = 200.
400
Brianna takes 4.75 minutes to bike around the block. How long does it take Brianna to bike 6 times around the block? Use place-value blocks to help.
28.5
400
A carton holds 42 erasers. Each eraser weighs 3.6 ounces. What is the total weight of the carton?
151.2 ounces.
400
The area of a rectangle is 7.56 square inches. If the length is 0.01 inches, what is the width?
756 inches.
400
48.5 x 0.01 =
.485
500
Mrs. Sanchez bought her three children new raincoats. Each raincoat cost $25.99. About how much did Mrs. Sanchez spend on the 3 raincoats? Is your estimate an overestimate or underestimate? Write an equation to show your work.
$75. 3 x 25 = 75 This is an underestimate because 25 < 25.99.
500
5 x 0.18 = 0.9
500
C
500
The area of a rectangle is 3.56 square inches. If the length is 0.1 inches, what is the width?
35.6 inches.
500
Mrs. Vargas has an SUV with a fuel capacity of 34.8 gallons. On a trip to Disney World, she filled the tank and then used exactly one tenth of the gas. How many gallons of gas did she use?
3.48 gallons.