How can we estimate multiplication?

Estimation of multiplication :

To estimate the result of multiplication (product), round the numbers to some close numbers that you can easily multiply mentally. One method of estimation is to round all factors to the biggest digit (place value) they have.

In order to estimate products, we round the given factors to the required place value. Estimating products help us to check the reasonableness of an answer.

For example,

Estimate the products of 53 and 47.

53 is rounded down to 50.

47 rounded up to 50.

Therefore,

$50 \times 50 = 2500$ 

The estimated product is 2500. 

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Updated on: 10-Oct-2022

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