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Special Cases
Estimating
Standard Multiplication - 2-Digit by 2-Digit
Standard Multiplication - Multiplying 2-Digit Numbers by Multiples of 10
Math Facts
100
What is 200 * 30?
6,000
100
Use rounding to estimate the problem: 38 * 29
40 * 30 = 1,200
100
32 * 21
672
100
What is 71 * 30?
2,130
100
What is: 4*2? 6*6? 7*3?
8 36 21
200
What is 400 * 80?
32,000
200
Use rounding to estimate the problem: 71 * 47
70 * 50 = 3,500
200
34 * 28
952
200
What is 24 * 40?
960
200
What is 2*7? 4*4? 8*6?
14 16 48
300
What is 600 * 50?
30,000
300
Use rounding to estimate the problem: 54 * 76
50 * 80 = 400
300
11 * 15
165
300
What is 82 * 80?
6,560
300
What is 1*9? 2*6? 4*5?
9 12 20
400
What is 800 * 70?
56,000
400
Use rounding to estimate the problem: 548 * 28
500 * 30 = 15,000
400
15 * 35
525
400
What is 52 * 50?
2,600
400
What is 5*8? 6*7? 9*8?
40 42 72
500
What is 325 * 30?
975
500
Use rounding to estimate the problem: 823 * 83
800 * 80 = 64,000
500
14 * 36
504
500
What is 27 * 60?
1,620
500
What is 9*9? 8*8? 7*8?
81 64 56