Maths➗

Today I am going to  be talking to you about a strategy that is fast and simple.
The strategy is called rounding and compensating.
There are two ways to do it.

A.

9 x 46 =

first round the 9 to the nearest 10. Then it will be 10.
so it will be 10 x 46.
But remember the 1 that you added to make the 10.
 1 x 46 = 46
10x46= 460
460 - 46 = 414

Now the next one.

B.

9x 46=
first round the 9 to the nearest 10. Then will be 10.

(10 x 46) - (1 x 4 )
=414

Which strategy is the most fastest and efficient way to solve the problem. 9 x 46=?