Question

помогите плиз не могу решить)

Answer 1

1 17/18*1 13/14=35/18*27/14=15/4=3 3/4

2 5/8:1 19/20=21/8*20/39=35/6=5 5/6

3 3/4-5 5/6=3 9/12-5 10/12=-2 1/12

2 25/78-1 1/26=2 25/78-1 3/78=1 22/78=1 11/39

-2 1/12:1 11/39=-25/12*39/40=-65/24=-2 17/24