Question

Calcule as expressões

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

B)-1+[1+(1-1)-11

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

D)-4+5-5+4-3+9+3

Answer 1

a) (-15+4)+[-18+(-3-7+5)]
(-11)+[ -18+( -5)]
-11+[-18-5]
-11-23= -34

b) -1+[1+(1-1)-11
-1+[1-11]
-1-10= -11

c) -1+(-2+5)+[-4+(-6+5-8)]
-1+( 3 )+ [-4+( -11)]
-1+3+[-15]
-1+3-15= -13

d) -4+5-5+4-3+9+3= 9

Espero ter ajudado!