Ответ:
Б)1 1/5*3+4\5*3=
1 1/5*3=6/5*3=18/5=3 3/5
4/5*3=12/5=2 2/5
2 2/5+3 3/5=5 5/5=6
е)
3 1/5*8/11+3 1/5*3/11=
3 1/5*8/11=16/5*8/11=128/55=2 18/55
3 1/5*3/11=16/5*3/11=48/55
2 18/55+48/55=3 1/5
ж)
4 2/3*7 1/12-6 1/12*4 2/3=
4 2/3*7 1\12=14/3*85/12=595/18=33 1/18
6 1/12*4 2/3=73/12*14/3=1022/36=511/18=28 7/18
33 1/18-28 7/18=595/18-511/18=84/18=4 2/3