611
-5+7--4+12 = 18
The problem of -5 plus 7 - (-4 plus -12) is equal to 18.
-5 + 12 + 5 = 12
2/3 + 1/9 + 5/6 = 12/18 + 2/18 + 15/18 = 29/18 = 111/18
It is: 5+13+18 = 36
(13+5)18=13+(5+18)
5 + -13 + 18 = 5 - 13 + 18 = 10
-2 + 18 + -5 = 11
3/10 plus 5/12 is the same as 18/60+25/60 = 43/60
5/12:7/18= (5/12)/(7/18)= (5/12)*(18/7)= 15/14
-12
30 - 12 = 18