99tasha

Verified answer

1) -2,301+4,2=1,899
2) -1 8/10-1 3/8=-1 4/5-1 3/8= -9/5-11/8= -72/40-55/40= -127/40= -3 7/40
3) -5/12-1/15= -25/60-4/60=-29/60
4) 3,5-7,312= -3,812
5) -2 6/10+1 7/8= -2 3/5+1 7/8= -13/5+15/8= -104/40+75/40= -29/40
6) -3/16-7/20=-15/80-28/80= -43/80
7) -1 31/32+2 7/24= -63/32+5/24= -189/96+20/96= -169/96= -1 73/96
8) -3 25/26-1 11/39= -103/26-50/39= -618/156-200/156= -818/156=-5 38/156=
 -5 19/78

Вот все: