Using Powers Of Ten And Halves - Math Worksheet With Answer Key
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1
2Name:
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)
1,120
90
40 × 28 =
60 ×
= 5,400
1,120
1.
= 540
56
90
4 × 14 =
6 ×
90
= 54
28
9
4 × 7 =
6 ×
2.
11,200
3.
3)
4)
11,200
60
140 × 80 =
× 50 = 3,000
60
4.
= 300
112
60
14 × 8 =
× 5
= 30
56
6
7 × 8 =
× 5
4,000
5.
70
6.
5)
6)
4,000
70
100 × 40 =
90 ×
= 6,300
42,000
= 630
40
70
10 × 4 =
9 ×
7.
= 63
20
7
5 × 4 =
9 ×
40,000
8.
1,600
7)
8)
70 × 600 =
42,000
50 × 800 =
40,000
9.
420
400
7 × 60 =
5 × 80 =
72,000
10.
42
40
7 × 6 =
5 × 8 =
45,000
11.
9)
10)
80 × 20 =
1,600
800 × 90 =
72,000
16,200
12.
80
720
8 × 10 =
80 × 9 =
49,000
13.
40
72
8 × 5 =
8 × 9 =
2,240
14.
11)
12)
50 × 900 =
45,000
180 × 90 =
16,200
450
162
5 × 90 =
18 × 9 =
45
81
5 × 9 =
9 × 9 =
13)
14)
70 × 700 =
49,000
32 × 70 =
2,240
490
112
7 × 70 =
16 × 7 =
49
56
7 × 7 =
8 × 7 =
1-10 93 86 79 71 64 57 50 43 36 29
Math
10
11-14 21 14 7
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