Question

помогите решить пример 3 целых 1/3 + (7 цел.1/2 - 4,25) : 9/20=

Answer 1

1) 7 1/2 - 4,25 = 7 1/2 - 4 1/4 = 7 2/4 - 5 1/4 = 3 1/4
2) 3 1/4:9/20=13/4:9/20=13/4×20/9= 13/1:5/9=65/9=7 2/9
3) 1/3 + 7 2/9 = 3/9 + 7 2/9 = 7 5/9

Answer 2

7 1/2-4.25=7.5-4.25=3.25
3.25:9/20=325/100:45/100=325/45
3 1/3+325/45=10/3+325/45=325/45+150/45=475/45=95/9=10 5/9