1.выполните действие a) 1 - 4/9 б)8 8/15 - 4 9/20 в)4 - 3 3/4 г)9 4/21 - 4 11/14 д) 7 1/10 - 3 1/6 е)5 5/33 - 4 1/2

А) 5/9
б) 4 8/15
в) 1/4

А) 1 - 4/9 = 1/1 - 4/9 = 9 - 4/9 = 5/9
б) 8 8/15 - 4 9/20 = 128/15 - 89/20 = 512 - 267/60 = 245/60 = 49/12
в) 4/1 - 3 3/4 = 4/1 - 15/4 = 16 - 15/4 = 1/4
г) 9 4/21 - 4 11/14 = 193/21 - 67/14 = 386 - 201/42 = 185/42
д) 7 1/10 - 3 1/6 = 71/10 - 19/6 = 213 - 95/30 = 118/30 = 59/15
е) 5 5/33 - 4 1/2 = 170/33 - 9/2 = 340 - 297/66 = 43/66