Решите 4,8*(0,75+1/6)-1 2/5
3/4+1/6=9/12+2/12=11/12 4 8/10*11/12=48/10*11/12=44/10=4,4 4,4-1,4=3
(3.6+0.8)-7/5=4.4-1.4=3