Question

Resolva cada expressões abaixo
A) 5+(2-6)
B) -15-(-23+12)
C) (9-15)-(12-20)
D) (-9+5)-(-6-8-4)
E) -(-2)+(-3)-{-2+[-1-(-2+1)]+5}
F) 20-{-10-[-8+(5-12)]-20}

Answer 1

A) 5+(-4)= 5-4= 1

B) -15-(-11)= -15+11= -4

C) -6-(-8)= -6+8= 2

D) -4-(-18)= -4+18= 14

E) +2-3-{-2+[-1-(-1)]+5}
-1-{-2+[-1+1]+5}
-1-{-2+[0]+5}
-1-{-2+5}
-1-{+3}
-1-3
-4

F) 20-{-10-[-8+(-7)]-20}
20-{-10-[-8-7]-20}
20-{-10-[-15]-20
20-{-10+15-20}
20-{5-20}
20-{-15}
20+15
35

Answer 2

A) 5+(2-6)=
5-4=1


B) -15-(-23+12)=
-15-11=
+4


C) (9-15)-(12-20)=
-6-(-8)=
-6+8=
+2


D) (-9+5)-(-6-8-4)=
-4-(-18)=
+14

E) -(-2)+(-3)-{-2+[-1-(-2+1)]+5}=
+2-3-{-2+[-1+2-1]+5}=
+2-3-{-2+[-1+2-1]+5}=
+2-3-{-2-1+2-1+5}=
+2-3+2+1-2+1-5=
+6-10=
-4

F) 20-{-10-[-8+(5-12)]-20}=
20-{-10-[-8(-7)]-20}=
20-{-1--[-8-7]-20}=
20-{-10-[-15]-20}=
20-{-10+15-20}=
20-{-30+15}=
20-{-15}=
20+15=
35