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Powers of 10
Whole Numbers X Whole Numbers
Whole Numbers X Decimal Numbers
Decimals X Decimals
WILD CARD!
100
Rewrite the expression as a power of 10, then solve. 4 X 10 X 10 X 10 =
4 X 10³ = 4,000
100
5 X 9 =
45
100
10 X 0.3 =
3
100
0.1 X 0.2 =
0.02
100
Farmer Jeff feeds his horses 480 pounds of food each month. How many pounds of food does he feed his horses in a year?
5,760 pounds
200
10¹ X 10² =
1,000
200
23 x 6 =
138
200
12 X 0.7 =
8.4
200
1.1 X 3.5 =
3.85
200
Steve's cat had 4 kittens. If each kitten weighed 3.5 ounces when it was born, how much do the kittens weigh altogether?
14 ounces
300
11.6 X 10 X 10 X =
11.6 X 10² = 116
300
80 X 400 =
32,000
300
24 X 6.21
149.04
300
2.6 X 0.6 =
1.56
300
When you multiply 13.9 by 0.01, is the answer greater than or less than 13.9? Explain how you know.
Less than; multiplying by 0.01 is the same as dividing by 100.
400
23 X 10¹ =
230
400
34 X 397 =
13,498
400
0.045 X 4 =
0.18
400
1.74 X 3.2 =
5.568
400
Dora painted a picture that is 24.5 inches long and 18 inches high. What is the area of the picture Dora painted?
441 square inches
500
1.57 X 10³ =
1,570
500
159 X 583 =
92,697
500
3.678 X 13 =
47.814
500
56.89 X 2.1 =
119.469
500
Explain how you might use the properties of multiplication to solve 4 X (25 X 8.84) mentally. Then solve.
Possible: You could use the Associative Property of Multiplication to write (4 X 25) X 8.84 = 100 X 8.84 = 884