math
posted by R .
I need help with these two math problems. i have been trying those for two hours. Can't find the answer.
use grouping symbols to make each equation true.
1/2*2^3/2*4/8*4/2=1/2
645*1+4/8+5=3
*= multiplication
is there any qucik way or any trick to solve these problems quickly because of test timing. immidiate answer would be very helpful

[(1/2)*(2^3)/2]* [4/(8*4/2)]
= [(1/2)*4]*(4/16) = 1/2
[645*(1+4)]/(8+5) = 39/13 = 3
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