how to make calculation very strong in pcm.......

Dear Syed

learn the squares vales at least upto 30, square roots upto 20 and learn the fraction values like 1/3=0.33, 1/6=0.166, 1/7=0.143 etc upto 1/20 at least

it will make your calculations really fast without calculators

 All the best.                                                          

AKASH GOYAL

AskiitiansExpert-IIT Delhi

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Practise makes a man perfect.

PRACTISE a lot

u must remember all the formulae and constants with their values

u can put up a chart in your room to remember those.