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Multiply by 10, 100, 1000
Multiply by multiples of 10, 100, 1000
Multiply by Powers of 10
Estimate Products
2x2 Multiplication
100
47x10
470
100
39x30
1,170
100
34 x 10 to the 3rd power
34,000
100
Estimate: 58 x 219
12,000
100
65 x 44
2,860
200
109 x 100
10,900
200
143x90
12,870
200
763 x 10 to the second power
76,300
200
Estimate: 652 x 73
49,000
200
99 x 95
9,405
300
514x____=5,140
10
300
360x30
10,800
300
732 x 10 squared
73,200
300
Estimate: 99 x 217
20,000
300
19 x 12
228
400
_______x10=91,760
9,176
400
285 x 80
22,800
400
73 x 10 to the 5th power
7,300,000
400
Estimate: 39 x 4,156
160,000
400
413 x 12
4,956
500
15,030= ________x10
1,503
500
663x6,000
3,978,000
500
3.4 x 10 to the fourth power
34,000
500
Estimate: 435 x 7,832
3,200,000
500
516 x 21
10, 836