Question

Calcule o valor das expressões numéricas

a) (3/2+2/5) + (5/4 - 2/3)

Answer 1

a)
3/2 + 2/5 = (3*5)+(2*2)/(2*5) = (15+4)/10 = 19/10
5/4 - 2/3 = (5*3)-(4*2)/(4*3) = (15-8)/12 = 7/12
19/10 + 7/12 = ...mmc (10 e 12) = 60
(60:10*19)/60 + (60:12*7)/60 = (6*19)/60 + (5*7)/60 = (114/60)+(35/60) = 
149/60 =