3-Digit by 2-Digit
Estimate 42 X 2
40 X 20 = 800
Estimate 56 x 10
60 x 10 = 600
25 X 12
5100
Estimate 38 X 7
40 X 70 = 2800
12 X 24
3072
Estimate 35 X 3
40 X 40 = 1600
21 x ? = 210
10
56 X 89
50,463
Estimate 63 X 3
60 X 30 = 1800
4 X ? = 4000
1000