199:2=99,5 99:2=49,5 99,5+49,5=149 Ответ: 2)-149
=6 42/48-3 16/48+5 15/48=8 41/48
=5 32/60+4 35/60-3 57/60=6 10/60=6 1/6
=(36 16/24+3 3/24)-(17 9/9-10 5/9)=39 19/24-7 4/9=
=39 57/72-7 32/72=32 25/72
=20 7/18-(15 45/54-9 50/54)=20 21/54-(14 99/54-9 50/54)=
=20 21/54-5 49/54=19 75/54-5 49/54=14 26/54=14 13/27
=5 45/70-2 30/70+6 49/70=9 64/70=9 32/35
5/35:5-1/7
7/28:7-1/4
25/35:5-5/7
18/27:3-6/9
20/24:4-5/6