Ответ смотри на фото и удачи тебе)
<span>1)1/2+1/3(13/4+5/6*1/8)=
5/6 * 1/8 = 5/48
13/4 + 5/48 = 156/48 + 5/48 = 161/48
1/3 * 161/48 = 161/44
1/2 + 161/144 = 72/144 +161/144 = 233/144 = 1 89/144
</span><span>2)5/3*4/6+(8/6-5/3)=
</span><span>8/6 -5/3 = 8/6 -10/6 = - 2/6
5/3 * 4/6 = 20/18 = 10/9
10/9 + ( - 2/6) = 20/18 -6/18 = 14/18 = 7/9
</span><span>3)2/4-1/2(3/8+6/7*1/5= решаю как если скобка после 1/5
</span><span>6/7 * 1/5 = 6/35
3/8 +6/35 = 105/280 +48/280 = 153/280
1/2 * 153/280 = 153/560
2/4 - 153/560 = 280/560 -153/560 = 127/560
</span>
86345:5=17269
38576:4=9644
134542:2=67271