Question

Calcule o valor das expressões :
A) (-5+9)+[-4+(5-2+6)-9]-(1-7)
B) -20+{-5+[(-12+30)+(-4-7)]}
C) -4+(5-6)+5-[3-(2-3)+4]+8-9
D) -18+{-2-[10-4+(-1-5)+11]}-6
E) 13-[-1-(5-6-7)]-2+[-3-(4-6)2]
F) -{7+11-[(-5+11)-8]}+[-10-(-2-17)]

Answer 1

Olá

Vamos lá,

A)
=(-5+9)+[-4+(5-2+6)-9]-(1-7)
=4+[-4+(3+6)-9]-(-6)
=4+[-4+9-9]+6
=4-4+6
=6

B)
=-20+{-5+[(-12+30)+(-4-7)]}
=-20+{-5+[18-11]}
=-20+{-5+7}
=-20+2
=-18

C)
=-4+(5-6)+5-[3-(2-3)+4]+8-9
=-4-1+5-[3+1+4]-1
=-5+5-8-1
=-9

D)
=-18+{-2-[10-4+(-1-5)+11]}-6
=-18+{-2-[6-6+11]}-6
=-18+{-2- 11}-6
=-18+{-13}-6
=-18-13-6
=-37


E)
=13-[-1-(5-6-7)]-2+[-3-(4-6)2]
=13-[-1-(-8)]-2+[-3-(-2)2]
=13-[-1+8]-2+[-3-(-4)]
=13-[+7]-2+[-3+4]
=13-7-2+1
=5

F)
=-{7+11-[(-5+11)-8]}+[-10-(-2-17)]
=-{18-[+6-8]}+[-10-(-19)]
=-{18-[ -2]}+[-10+19]
=-{18+2}+9
=- 20+9
=-11

Bons estudos, dúvidas só chamar !!! :>))