Question

помогите вычислить пример

Answer 1

............................

Answer 2

3-1/4=2 3/4=11/4

Answer 3

1:11/4=1*4/11=4/11

Answer 4

2-4/11=1 7/11=18/11

Answer 5

1:18/11=1*11/18=11/18

Answer 6

1-11/18=7/18