б)
1) 7,4 : 0,37 = 740/37 = 20
2) 11/14 · 0,7 = 11/14 · 7/10 = (11·7)/(14·10) = (11·1)/(2·10) = 11/20
3) 0,3 - 20 - 11/20 = 3/10 - 20 - 11/20 = 3/10 - 20/1 - 11/20 = (3·2)/(10·2) - (20·20)/(1·20) - 11/20 = 6/20 - 400/20 - 11/20 = (6-400-11)/20 = -405/20 = -81/4
4) 2 1/8 = 17/8
5) 0,16 : 0,01 = 16
6) 17/8 · 16 = 17/8 · 16/1 = (17·16)/(8·1) = (17·2)/1 = 34
7) 1 + 34 = 35
8) -81/4 / 35 = -81/4 : 35/1 = -81/4 · 1/35 = -81/(4·35) = -81/140
Ответ: -81/140