Estimating the product of 68 and 21 . . .
It is easy in your head to think that this product would be close to 70 times 20. Again, in your head, you can figure that product to be 1400.
Chat with our AI personalities
89 - 21 = 68
2 x 2 x 17 = 68
90 x 70 = 6300
21 as a product of its prime factors is 1 X 3 X 7.
To round to estimate the product of 38 x 2, you first round each number to a more manageable value. In this case, you can round 38 to 40 and 2 to 0. Then, multiply the rounded numbers together to get an estimate of the product. In this case, 40 x 0 = 0. So, the estimated product of 38 x 2 is 0.