Multiply Greater Numbers by Powers of 10
What is 103?
1,000
Use compatible numbers to estimate 27×6.
25 x 5 = 125
40 x 30
1200
12 x 15
180
234 x 12
2,808
Multiply 50 x 102.
5,000
Estimate 45×8 using rounding.
50 x 10 = 500
300 x 7
2100
23 x 34
782
456×23
10,488
What is 1000 x 102?
100,000
Estimate 62×4using compatible numbers.
60 x 5 = 300
2000 x 5
10000
45 x 56
2,520
678×24
16,272
Multiply 400 x 103.
400,000
How would you estimate 78×5?
80 x 5 = 450
60 x 90
5400
57 x 69
3,933
789×45
35,505
What is 10,000 x 103?
10,000,000
Estimate 93×7 using rounding.
90 x 10 = 900
4000 x 2
8000
36 x 48
1,728
856×34
29,104