Multiplying Decimals by 10, 100, or 1,000
0.09 x 10
0.9
0.66 x 5
0.7 x 5 = 3.5
5 x 3.4
17
9.3 x 4.1
38.13
The principal of Mountain Middle School has a big glass jar of marbles. Each of the 1,000 marbles weighs 1.25 ounces. Find the total weight of all the marbles in ounces.
1,250 ounces
3.1 x 1,000
3,100
0.6 x 184
0.6 x 180 = 108
0.6 x 200 = 120
0.9 x 9
8.1
3.02 x 0.6
1.812
5.2 inches
7.41 x 10
74.1
37 x 0.97
6.22 x 5
31.1
2.04 x 1.8
3.672
Georgia rollerskates 0.43 miles around her block each day. If she rollerskated 279 days last year, about how many miles did she rollerskate?
0.4 x 280 is about 112
0.5 x 280 is about 140
80.607 x 100
8,060.7
25 x 0.37
25 x 0.4 = 10
5.01 x 6
30.06
8.6 x 0.08
0.688
Marcy picked 18.8 pounds of peaches at the pick-your-own orchard. Each pound of peaches costs $1.28. About how much will her peaches cost?
20 x $1.25 is about $25
20 x $1 is about $20
20 x $1.30 is about $26
9.461 x 102
946.1
0.87 x 412
0.9 x 400 = 360
1.809 x 25
45.225
32.3 x 0.07
2.261
The fastest growing flowering plant is the Hesperoyucca Whipplei. It was recorded that one of these plants grew at a rate of 25.4 cm per day. How many centimeters did this plant grow in 7 days?
It grew 177.8 cm.
56.0307 x 103
56030.7
0.79 x 51
0.8 x 50 = 40
6.991 x 24
167.784
3.104 x 6.2
19.2448
Mary Ann ordered 3 pens and a box of paper on the internet. Each pen costs $1.65 and the paper cost $3.95 per box. How much did she spend?
(3 x $1.65) + $3.95 = $8.90