Addition Shortcuts

Addition Shortcuts

Hi Friends, here we will give short cuts for doing addition problems. Here we will explain how to do addition without paper and pen.

This addition shortcut will be very useful for all competitive exams. Please see below addition shortcuts.

Addition of numbers close to multiples of ten (e.g. 19, 29, 38, 59 etc.)

This technique is useful for Mental calculations
116 + 39 (Here we can write this 39 as 40-1)
= 116 + (40 – 1)
= 116 + 40 – 1

= 156 – 1 (Instead of adding 39 to 116, we just add 40 to 116 (because we can do this without using pen and paper) and later we subtract one from it)
= 155
Try this.. This is very useful tip while doing calculations.

Now lets try another example.
116 + 97
= 116 + (100 – 3)
= 116 + 100 – 3 (Here, instead of adding 97 to
116, we are just adding a 100 to 116 and
then subtracting 3 from it 🙂
= 216 – 3
= 213

Addition of decimals

12.5 + 6.25
= (12 + 0.5) +
(6 + 0.25)
= 12 + 6 + 0.5
+ 0.25 (Here
we just added
the rounded numbers first and later we added
the decimal numbers 🙂
= 18 + 0.5 + 0.25
= 18.75

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