Multiply Decimals to a Power of 10
42.3 x 1
42.3
5 x .5
2.5
0.4 x 0.5 =
.20
3 x 7
21
Cooper went to the store and bought two candy bars for $1.27 each. How much money did he spend?
$2.54
0.086 x 10
.86
Move the decimal point one place to the right
4 x .27
1.08
0.3 x 0.7
4 x 8
32
Stella went to the store to buy a present for her mom that costs $12.24. She gave the cashier a twenty dollar bill. How much change did she get back?
$7.76
563.7 x 10 2
56,370.0
Move the decimal two places to the right.
0.78 x 5
3.90
0.5 x 1.7
0.85
7 x 6
42
Mark bought 5 notebooks for school that cost 0.87 cents each. How much did he spend on the notebooks, not including any tax?
$4.35
0.9463 x 102
94.63
Move the decimal point two places to the right.
6 x 2.03
12.18
0.6 x 1.2
.72
8 x 9
72
Mrs. Rugenus is buying carpeting for her house. She measured the length of the living room to be 13.7 feet and the width to be 15.8 feet. Find the area of that room so that she knows how much carpeting to get.
216.46 square feet
681.7 x 103
681,700.0
Move the decimal point three places to the right.
100 x 0.12
12.0
2.8 x 0.3
0.84
11 x 12
132
John has a Pokemon card collection valued at $34.54. Matt has a Pokemon card collection valued at $345.40. Which collection is worth more? How can you tell?
Matt's is worth more because of the decimal point being behind the five instead of behind the 4. The place value shows that Matt's is in the hundreds and John's is only in the tens.