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)
50
1,400
80 ×
= 4,000
70 × 20 =
50
1.
= 400
50
70
8 ×
7 × 10 =
1,400
= 40
5
35
8 ×
7 × 5 =
2.
1,800
3.
3)
4)
1,800
2,160
50 × 36 =
36 × 60 =
2,160
4.
90
108
5 × 18 =
18 × 6 =
45
54
5 × 9 =
9 × 6 =
6,000
5.
21,000
6.
5)
6)
6,000
21,000
60 × 100 =
30 × 700 =
30
60
210
6 × 10 =
3 × 70 =
7.
30
21
6 × 5 =
3 × 7 =
63,000
8.
80
7)
8)
50 ×
30
= 1,500
90 × 700 =
63,000
9.
= 150
30
630
5 ×
9 × 70 =
8,000
10.
= 15
3
63
5 ×
9 × 7 =
35,000
11.
9)
10)
80 ×
80
= 6,400
80 × 100 =
8,000
50
12.
= 640
80
80
8 ×
8 × 10 =
9,800
13.
= 64
8
40
8 ×
8 × 5 =
9,600
14.
11)
12)
700 × 50 =
35,000
50
× 60 = 3,000
= 300
350
50
70 × 5 =
× 6
= 30
35
5
7 × 5 =
× 6
13)
14)
70 × 140 =
9,800
60 × 160 =
9,600
98
96
7 × 14 =
6 × 16 =
49
48
7 × 7 =
6 × 8 =
1-10 93 86 79 71 64 57 50 43 36 29
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