Question

4 59 + 1318 - ( 1  13 - 718)

Answer 1

4 5/9+13/18-(1 1/3-7/18)=4 1/3
1) 1 1/3-7/18=4/3-7/18=24/18-7/18=17/18
2) 4 5/9+13/18=41/9+13/18=82/18+13/18=95/18
3) 95/18=17/18=78/18=4 6/18=4 1/3