(7\9+4\27)•9= (27|28+5\8)•28= (11\13+7\26)•13= (3\16+3\4)•8= (25\32+19\24)•2= (4\7-3\28)•14= (1 2\3-10\11)•1\5= (2 7\12+3 1\10)•2\13= (7\22+7\11)•44= (3 5\6-1 10\13)•3\23=

1) (7/9+4/27)*9=8 1/3

7/9+4/27=21/27+4/27=25/27
25/27*9=25/27*9/1=25/3=8 1/3

2) (27/28+5/8)*28=42 1/2

27/28+5/8=50/56+35/56=85/56
85/56*28=85/2=42 1/2

3) (11/13+7/26)*13=14 1/2

11/13+7/26=22/26+7/26=29/26
29/26*13=29/26*13/1=29/2=14 1/2

4) (3/16+3/4)*8=7 1/2

3/16+3/4=3/16+12/16=15/16
15/16*8=15/2=7 1/2

Дальше не успеваю