А) (14+16)*4=120
б) (18+12)*3=90
в) (13+17)*7=210
г) (18-8)*68=680
Д) (16-15)*74=74
е) (33-31)*52= 104
3 8/9-х=1 5/9
x = 3 8/9 - 1 5/9
x = 2 3/9 = 2 1/3
(у-8 12/19)+1 7/19=6 2/19
y = 6 2/19 - 1 7/19 + 8 12/19
y = 14 14/19 - 1 7/19
y = 13 7/19
11>1
10<20
12<14
1дм=10см
1дм2см<2дм
5л=5кг