Question

Calcula-3/15--4/10+5/4-2/5+7/8+-1/12

Answer 1

-3/15--4/10+5/4-2/5+7/8+-1/12=
-1/5+2/5+5/4-2/5+7/8-1/2    Transformando las fracciones a denominador                                                 común

-8/40+16/40+50/40-16/40+35/40-20/40=
-8+16+50-16+35-20/40
57/40

Answer 2

Debes buscar fracciones equivalentes para poder sumar o restar
3/5 - 4/10 =
6/30 - 12/30 = 6/30
5/4 - 2/5=
25/20 - 8/20 = 17/20
7/8+ 1/12 =
21/24 + 2/24 = 19/24

6/30+17/20+19/24=

24/120+ 102/120+95/120= 221/120