Question

Faça as operações indicadas. (nao esqueça: primeiro os cálculos dentro dos parênteses)
a)(3/4 - 1/2)- 3/20
b)3/4-(1/2 - 3/20)
c)(2/3 + 1/6) - (1-3/10)

Answer 1

a]3/4-2/4=1/4-3/20=5/20-3/20=2/20simplif por 2=1/10

b]3/4(1/2-3/20)=3/4-(10/20-3/20)=3/4-7/20=15/20-7/20=8/20=4/10=2/5

c](4/6+1/6)-(10/10-3/10)=3/6-7/10=15/30-21/30=6/30=1/5