Question

Simplifique as expressoes numericas:
A) (-2)^2 -2^-1
B)5^-1+1-3^-1
C)3.10^-2+5.2^-1
D)6^2-(-7)^2 sobre 3^-2+3^-1

Answer 1

a) 4-1/2= 7/2
b) 13/15
c)253/100
d) -117/4