Good skills in addition are an asset to students while solving Math problems at advanced level. Here are a few tricks that help you add numbers quickly and do sums with ease and confidence.
Adding 10 to a two digit number is easy since you have to increase the digit in the 10Th place by adding 1.
It is very simple as you have just added 1 to the number 2 which is in the tenth place in 21.Using this as a rule of thumb, you can add more complicated numbers .
There are two methods for adding these two digit numbers.
You can split 69 as 70-1
Now you add
So you need not take a paper and pencil to add 81+69 but can use the multiplication of 10 that is nearest to the number 69, add numbers and subtract 1 from it for getting the answer.
To get the answer for 81+69, you can follow this method also.
Split 69 into 60+9
Here also you do addition with ease without breaking your head over a two digit sum.
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