DEAR POTTU

I DID NOT PROPERLY UNDERSTAND THE ROUNDING OF TENS OTHERS WERE VERY EASY.HOW 513 ROUNDS TO TEN ANSWER IS 510.PLEASE HELP ME IN THIS.MY SA1 IS ON THIS COMMING SUNDAY AND THIS PORTION IS THERE.PLEASE HELP ME FAST

Round off a number to nearest ten means to find out the multiple of ten nearest to that number 
Taking the given number 513
Now we first have to find the multiples of ten i.e 510, 520, 530....
Now find which is nearest to the given number and the answer is 510.
Hence nearest ten value of 513 is 510.

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I THNK IT IS EASY BUT NOT UNDERSTANDING

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