Question

caucule as expressoes corretamente

Answer 1

A-(15+4)+[-18+(-3-7+5)]=
19+[-18+(-5)]=
19+[-18-5]=
19+[-23]=
19-23=
-4

B--1+{1+(1-1)-11}=
-1+{1+0-11}=
-1+{-10}=
-1-10=
-11

C--1+(-2+5)+[-4+(-6+5-8)]=
-1+3+[-4+(-9)]=
-1+3+[-4-9]=
-1+3+[-13]=
-1+3-13=
-1-10=
-11

D--4+5-5+4-3+9+3=
1-5+4-3+9+3=
-4+4-3+9+3=
-3+9+3=
6+3=
9

Espero ter ajudado (a)??!