You would have to round the factors into a landmark number.
This would make multiplying a lot easier because of the fact, you can do it mentally.
Ex: 9 x 11 = ?
So, 9 is close to 10
11 is close to 10
So, 10 x 10 is 100
Estimation is 100
The estimate for the product of 289 and 7 is 2,000.
7178 is a single number, there is no product involved.
Ninja
look at the scales
I'd choose 20 and 30 and estimate the product at 600. The actual answer is 625.
The estimate for the product of 289 and 7 is 2,000.
YOU CAN estimate it by if your product has more than 5
when both factors in a multiplication problem are rounded up to estimate the product, the estimate is an overestimate.
Explain how you know whether an estimate of a product is an overestimate or an underestimate?
7178 is a single number, there is no product involved.
Ninja
No need to estimate. The true answer is 345
look at the scales
I'd choose 20 and 30 and estimate the product at 600. The actual answer is 625.
81,900
5,200
190 is.