Question

1-Faça as seguintes expressões
A) 7+(6-1)-(-9+2-5)

B) 25+[-4+1-(-3+7)]

C) -14+{+3-[2-(-7+9)]}

D) -30+(-5-1)-(-1-7)

Answer 1

A) 7+(6-1)-(-9+2-5)

7+(5)-(-12)=
7+5+12=
24


B) 25+[-4+1-(-3+7)]

25+[-4+1-(4)]
25+[-4+1-4]
25+[-7]
25-7
18

C) -14+{+3-[2-(-7+9)]}

-14+{+3-[2-(+2)]}
-14+{+3-[2-2]}
-14+3
-11

D) -30+(-5-1)-(-1-7)

-30+(-6)-(-8)
-30-6+8
-28