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) 5/9б) 4 8/15в) 1/4

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