1. а) 12; +6; +8
б) -32; -8
в) 12, -32, -8, +6, +8
г) -8 - +8
2. -79>-81; б) -45<13
3. |-17|+|17|=34, б) 42
4. 74+(-63) = 74-63= 11, -7+18 =18-7= 11, -57+57=57-57=0, -81(-34)= -81-34 =-115, 24-39=-15, -39-44=-83, -86-(-103)=-86-103=-189