Qual o valor das expressões?
A)20-(-2+1+9-5)-3+(15-9)=
B)-30-(-4)-(-8-6-12+2)+(+3+2)=
C)-(-2+1-2)-(-5)+(8-7)-(+15+5)=
A)20-(-2+1+9-5)-3+(15-9)=
B)-30-(-4)-(-8-6-12+2)+(+3+2)=
C)-(-2+1-2)-(-5)+(8-7)-(+15+5)=
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a)
b)
c)