Question

Calcule o valor numérico das expressões:

Answer 1

a) 1/3+(-1/5)= 1/3-1/5= 5-3/15=2/15
b)2.7-(-1/2)= 14+1/2=28+1/2=29/2
c) (1/2)²-(1/3).(1/4)= 1/4-1/12=3-1/12=2/12=1/6