Every time we see the sign of multiplication we start using the method we were taught in school.

It is time consuming but saves our brain fuel.

But if we use our brain then we can save time

What is Multiplication

Multiplication is addition.

Yes it is.

Consider this example

Multiply 2 by 3

2* 3 .

It means that add 2 three times or add 3 two times

2+2+2 = 6

or

3 + 3 = 6

So if we want to multiply 27 by 39 then it means addition of 27 to 39 time or addition of 39 to 27 term

there are diffrent ways of multiplication we can use depending upon our way of understanding

for e.g.

2 8

×

__3 5__

140

__84×__

__980__

use this technique

28 is 20 + 8

35 is 30 + 5

Now first multiply the exterior terms mean that 30 × 20 = 600

then multiply cross term 20 ×5 = 100

30×8 = 240

in last

__8 ×5 = 40__

final result is addition

__28×35= 980__