номер 529 помогите решить!!!!

1)  1/3 -(+2/3) = 1/3 - 2/3 = (1-2)/3 = -1/3
2)   -2/5 - (-3/5) = -2/5 + 3/5= (-2+3)/5 = 1/5
3)  ⇔  2)
4)   -3/7 -(+4/7) = -37 - 4/7 = (-3 - 4)/7 = -1
5)  5/8 - (-7/8) = 5/8+7/8 = (5+7)/8 = 12/8 = 1'4/8 = 1'1/2 =1,5
6)  -1/9 - (+2/9) = -1/9 -2/9 = -(1+2)/9 = - 3/9 = -1/3