Question

15. ( - 2/3)=
- 2/5 * ( - 25/4) =
- 2/3 + 1 - 3/2 =
2/3 dividido 5/6 - 5

Answer 1

15. ( - 2/3)=
-30/3= -10

- 2/5 * ( - 25/4) = 50/20 = 5/2

- 2/3 + 1 - 3/2 = -4/6 + 6/6 -9/6 = -7/6

2/3 dividido 5/6 - 5 = 2/3 . 6/5 - 5= 12/15-75/15
= -63/15

espero ter ajudado