Making Your Math Simple

Applying Tactics in Multiplication

While multiplying, we may also use certain tactics to find the answer quickly.

Example 1

89 x 8 For making the above calculation simple we may do as mentioned below

89 x 8
= (90 -1) x 8
= 720 – 8
= 712.

But avoid bifurcating a number using minus sign as far as possible. The above example can also be solved as follows:

89 x 8
= (80 + 9) x 8 Now we have used “80+9” in place of “90-1”
= 640 + 72
= 712

Example 2

65 x 12
= (60 + 5) x 12
= 720 + 60
= 780.

OR

65 x 12
= 65 x (10+2)
= 650+130
= 780

Example 3

34 x 9
= (30 + 4) x 9
= 270 + 36
= 306

Example 4

312 x 14
= (300 + 10 +2) x 14
= 4200+140+28
= 4368

With a little practice you will be devising your own ways of such manipulations to get the answer quickly and accurately.

The above mentioned methods make the things simpler and more accurate, the only thing required is applying these tactics regularly while doing such calculations. So start using this method in your real life to improve your calculating speed.

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