Interesting Maths Calculation 2

Here is another maths calculation again.

Let's try this.

97 x 92 = ????

This question can't be solved by using my previous method in 'Interesting Maths Calculation 1'.

So,
can we still calculate it in a short time?

Yea,
you can!

Let me show you another method.
This method is useful when it come to multiple where it close to 100.

97 x 92

First, we use 100 to minus both of the number.

97 ---> 3
92 ---> 8

Secondly, you may use 97 to deducted by 8 or 92 deducted by 3.

97 - 8 = 89
92 - 3 = 89

Either one.

Thirdly, multiple up both numbers of 3 and 8.

3 x 8 = 24.

Forth, combine both numbers.

8924

Get what I mean?

Let's try another one.

88 x 92 = ????

Step 1:
100 - 88 = 12
100 - 92 = 8

Step 2:
88 - 8 = 80
or
92 - 12 = 80

Step 3:
12 x 8 = 96

Answer: 8096