In this article you are going to learn addition of those numbers which are close to Multiple of 10.
Numbers, which are close to multiple of 10, are rounded off. For example if the number is 38 then it is rounded off to 40. i.e. (40-2)
Now let’s take an example.
Method 1:
52 + 38
Here we are rounding 38 off. And writing it as (40 – 2).
So we can write
52 + (40 – 2)
Open the parenthesis.
52 + 40 – 2
Now it is easy to add 40 in 52. This addition gives us 92 as a relult.
So we can write
92 – 2
Subtracting 2 from any number is very easy.
So the answer is: 90.
Method 2:
In this method, 52 is rounded off and you can write it as (50 + 2).
And the rest of the procedure is same.
(50+2) + 38
Open the parenthesis.
50 + 2 + 38
Now adding 38 into 50 is easy and results in 88. So now we have
88 + 2
So the answer is: 90