Using Powers Of Ten And Halves - Math Worksheet With Answer Key Page 2
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1
2Answer Key
Name:
Using Powers of Ten and Halves
Break each problem down using powers of ten and/or halves to solve.
A n s w e r s
1)
2)
42,000
30
70 × 600 =
× 60 = 1,800
42,000
1.
= 180
420
30
7 × 60 =
× 6
30
= 18
42
3
7 × 6 =
× 6
2.
6,400
3.
3)
4)
6,400
1,440
160 × 40 =
60 × 24 =
1,440
4.
64
72
16 × 4 =
6 × 12 =
32
36
8 × 4 =
6 × 6 =
9,800
5.
80
6.
5)
6)
9,800
80
140 × 70 =
× 70 = 5,600
24,000
= 560
98
80
14 × 7 =
× 7
7.
= 56
49
8
7 × 7 =
× 7
80
8.
9,000
7)
8)
40 × 600 =
24,000
60 ×
80
= 4,800
9.
= 480
240
80
4 × 60 =
6 ×
2,520
10.
= 48
24
8
4 × 6 =
6 ×
35,000
11.
9)
10)
100 × 90 =
9,000
28 × 90 =
2,520
50
12.
90
126
10 × 9 =
14 × 9 =
6,000
13.
45
63
5 × 9 =
7 × 9 =
1,680
14.
11)
12)
50 × 700 =
35,000
90 ×
50
= 4,500
= 450
350
50
5 × 70 =
9 ×
= 45
35
5
5 × 7 =
9 ×
13)
14)
120 × 50 =
6,000
28 × 60 =
1,680
60
84
12 × 5 =
14 × 6 =
30
42
6 × 5 =
7 × 6 =
1-10 93 86 79 71 64 57 50 43 36 29
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