(40: 72-1 /3 дробь)•2 1/4 дробь+8/9дробь

1) 40 : 72 = 10/18 = 5/9
2) 5/9 - 1/3 = 5/9 - 3/9 = 2/9
3) 2/9 • 2 1/4 = 2/9 • 9/4 = 1/2
4) 1/2 + 8/9 = 9/18 + 16/18 = 25/18 = 1 7/18
ответ 1 7/18

1)40:72=40/72=20/36=59
2) 5/9-1/3=2/9
3)2/9*2 1/4=2/9*9/4=1/2
4)1/2+8/9=25/18=1 7/18