Mental Math
Division of Decimals
Multiplication of Decimals
Story Problems
Grab Bag
100
54.8 x 100
5,480
100
5.4 / 9
0.6
100
0.6 x 182
109.2
100
Alyssa has a CD that holds 700 megabytes of information. She has saved 53 pictures, each using 2.24 megabytes, to the CD. How much space is left on the CD?
581.28 megabytes
100
An apple farmer has planted 0.3 of his orchard with cherry trees. The orchard is 8.59 acres in size. How many acres are planted with cherry trees?
2.577 acres
200
89.6 x 10
896
200
36 / 1.2
30
200
43.2 / 9
4.8
200
Lori bought some plums and 4 peaches. The peaches cost $1.99 in all and the plums cost $0.33 each. She paid $3.86 in all, not including tax. How many plums did she buy?
6 plums
200
8.6 x 0.08
0.688
300
7.08 x 10
70.8
300
0.28 / 0.7
0.4
300
99.7 x 84
8374.8
300
Tom bought 8 chicken breasts and 5 steaks. Each chicken breast weighed 0.35 pound and each steak weighed 1.25 pound. How many pounds of meat did Tom buy?
9.05 pounds
300
To determine the tip for a resaurant server, many people multiply the amount of the check by 15%. Find the amount of the tip on a check of $24.00.
$3.60
400
0.3 x 22
0.66
400
$42.45 / 3
$14.15
400
313 x 0.06
18.78
400
A hardware store has 5 employees. Each employee works the same number of hours every week, and each one earns $10.50 per hour. Last week they worked a total of 167.5 hours. How many hours did each employee work?
33.5 hours
400
A three pound package of ground beef costs $11.81. About how much does one pound cost?
$3.94
500
.00458 x 100
0.458
500
3.99 / 0.84
4.75
500
0.250 x 0.025
0.0055
500
The Meadows Farm has a total of 160 acres. Three times as many acres are used to plant crops as are used for pasture. How many acres are used to plant crops?
120 acres
500
Estimate by rounding or using compatible numbers...43.1 / 0.792
42 / 0.7 = 60 (example)