Question

Find the value of 815×213 Although these numbers aren't quite as nice as the ones from the example, the procedure is the same, so the difficulty is the same same excepting the ability to perform the calculation in your head. You may choose to use a calculator.

Answer 1

The answer is 173,595‬

Explanation:

Firstly, you multiply 815 by the first number of 213 which is 3

So:

`815* 3=2445\\`

Then 815 by the second number:

`815* 1=815\\`

Then 815 by the third number:

`815* 2=1630\\`

Then you add all the numbers, but you have to put a zero to the right of the second product and two zeroes to the third product and so on..

In this case the addition is :

2445+8150+163000 = 173595