maths

Hi, could someone please tell me how I would go about working these out: (the answer must be in the form aãb where a and b are integers and b is as small as possible.)

1) Simplify ã500
2) Simplify ã50 x ã60

Also..

Simplify the following fractions so that there is no root in the denominator:
1/ã5
12/ã3

Thankyou so much!

by the way, where there is a box and the a, is meant to be a square root sign!

55-4=

asked by em
  1. solution: if a number is mutliplied by 7 and 56 is subracted from the product the result is equal to 14?find the number.

    posted by mohi

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