Turn Your Brain Into A Calculator With These Mental Math Tricks

"

"

What Is Mental Math?  Mental math is all about training your mind to look beyond the obvious and calculate the solution to a problem using easy methods. 

"

"

1. Left Is The New Right For easy and fast mental math calculations, you should add or subtract from the left to the right For example, adding 340 + 215 will quickly give you the answer: 555. In case of carrying forward numbers, just add it to the digit before them, like 340 + 285 = 625..

"

"

2. Remember Your Table It is essential that you remember your basic tables of 12, 13, 14, 15 and more – it will give you an added edge to calculate big numbers faster, thus saving on calculation time. Example: 3/4th  can also be considered 75%.

"

"

3.  Round It Up Rounding off numbers to make calculations easy is a great trick and can be useful while solving the entrance exam paper.

"

"

Imagine you have to calculate 689 + 350. Now, with the rounding-off method, we simply round of 689 to 700 and add 700 + 350 which is equal to 1050. Now, as 700 – 689 is 11, we simply subtract 11 from the result and arrive at the solution of 1039. Child’s play, isn’t it?

"

"

4. Learning Your Square squares are nothing but a number repeated itself. So, the square of 4 is 16, the square of 7 is 49 while the square of 14 is 196. It is advised that all JEE aspirants learn these square tables till 20

"

"

5. Breaking Down  Problem A few questions in the exam might feel difficult or confusing – the best way to tackle them is by breaking down a complex problem in a few ‘easy-to-calculate’ steps.

"

"

For example, if you need to multiple 6 x (85 + 30), what would you do? As per the rule of BODMAS, we can solve this problem as : (6 X 80) + (6 x 5) + (6 x 30) = 690.

Start your Competitive Exams prepartion with India's Top Publishers Books