Пошаговое объяснение:
(9 3/8+4 11/18)-(-8 1/8+3 5/18)=18 5/6
1) 9 3/8+4 11/18=(9+4)+(54/144+88/144)=
=13+142/144=13+71/72=13 71/72
2) (-8 1/8+3 5/18)=( - 8+3)+(-18/144+40/144)=
= - 5+22/144= - 5+11/72= - 4 72/72+11/72=
= - 4 61/72
3) 13 71/72-(-4 61/72)=13 71/72+4 61/72=
=(13+4)+(71/72+61/72)=17 +132/72=
=17+1 60/72=18 60/72=18 5/6
