Adding Two Digit Numbers Trick
Let us begin with the basic method of adding two numbers
Take the example of 71 + 69
This is the usual method which we do with the help of pen
and paper
Are you interested to do these calculations mentally?
If your answer is yes,then read below to learn the trick.
Trick:
In addition, adding 10 to a two digit number is easy as we
just need to increase the digit in the tenth place by 1. 12 + 10 is 22,34 + 10
is 44 and so on.
We use the same rule while adding any two numbers.To be
clear, see how 71 and 69 is added
Method 1:
Step 1:
71 + 69 can be written as 71 + 70 -1
In this step, 69 is split as 70 and 1
Step 2:
Addition of 71 + 70 is easy which gives
141 ie 71 + 70 = 141
Now subtract 1 from 141 ie 141 - 1 = 140.
This gives the answer i.e. 71 + 69 = 140
Method 2:
Alternatively, the below method can
also be used.The choice of method depends on the numbers that are added
Step 1:
71 + 69 can be written as 71 + 60 + 9
In this step, 69 is split as 60 and 9
Step 2:
Addition of 71 + 60 is easy which gives
131 ie 71 + 60 = 131
Now add 9 to 131 ie 131 + 9 = 140.
This gives the answer i.e. 71 + 69 = 140
When you practice this, you can increase the speed and
improve your addition skills.Try some practice questions
Practice Questions
1.19+26=?
2.31+39=?
3.14+45=?
4.11+79=?
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