how to do the next operation 2/12+1/(6)-7/30
2/12+1/(6)-7/30 ......notice that 2/12 = 1/6......so we have
1/6 + 1/6 - 7/30 =
2/6 - 7/30 =
1/3 - 7/30 now....the common denominator is 30, so.....
10/30 - 7/30 =
3/30 =
1/10