Question

A) 3,6÷1,2+4,2×2,5-(2,5-1,5)

Answer 1

Convertimos decimales a fracciones
(36/10)/(12/10)+(42/10)x(25/10)-((25/10-(15/10))
36x10/12x10+42x10/25x10-25x10/15x10
36/12+42/25-25/15
3+42/25-5/3
(9-5)/3 + 42/25
4/3+42/25
1.3+1.68
3.01