Question

(-1/4)+(+3/5)+(-/10) quero a conta por favor !!

Answer 1

MMC entra 4,5 e 10 = 40

- 1/4 + 3/5 - 1/10 =
(10 × (- 1)) / 40 + (8 × 3) / 40 + (4 × (- 1)) / 40 =
- 10 / 40 +  24 / 40 - 4 / 40 =
(- 10 + 24 - 4) / 40 = 
10 / 40 = 
1 / 4