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)
48,000
50
600 × 80 =
50 ×
= 2,500
48,000
1.
= 250
480
50
60 × 8 =
5 ×
50
= 25
48
5
6 × 8 =
5 ×
2.
3,600
3.
3)
4)
3,600
42,000
120 × 30 =
600 × 70 =
42,000
4.
36
420
12 × 3 =
60 × 7 =
18
42
6 × 3 =
6 × 7 =
840
5.
2,160
6.
5)
6)
840
2,160
30 × 28 =
36 × 60 =
48,000
42
108
3 × 14 =
18 × 6 =
7.
21
54
3 × 7 =
9 × 6 =
72,000
8.
70
7)
8)
800 × 60 =
48,000
800 × 90 =
72,000
9.
480
720
80 × 6 =
80 × 9 =
1,680
10.
48
72
8 × 6 =
8 × 9 =
60
11.
9)
10)
70 ×
70
= 4,900
60 × 28 =
1,680
10,800
12.
= 490
70
84
7 ×
6 × 14 =
8,000
13.
= 49
7
42
7 ×
6 × 7 =
40
14.
11)
12)
60 ×
60
= 3,600
120 × 90 =
10,800
= 360
60
108
6 ×
12 × 9 =
= 36
6
54
6 ×
6 × 9 =
13)
14)
80 × 100 =
8,000
50 ×
40
= 2,000
= 200
80
40
8 × 10 =
5 ×
= 20
40
4
8 × 5 =
5 ×
1-10 93 86 79 71 64 57 50 43 36 29
Math
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