А) (-13+6)*t + (12-17)*q = -7*t - 5*q = - (7*t + 5*q)
б) -(2 1/8 + 7/36 + 1/2 - 3/4)*с
НОК(2,4,8,12,36) = 72
- ( 2 9/72 + 14/72 +36/72 - 18/72)*с = - 2 5/72
1) 61/5=12.2
2)12.2-2=10.2
вроде так ))
---------------------------&
7+6=13
70+60=130
73+63=136
2+3=5
20+30=50
22+33=55
13-7=6
130-70=60
136-73=63
5-2=3
50-20=30
55-22=33