Question

Resolva cada expressao a seguir

A) 9-(-7+15)+(8-19)

B 73-[51-(-34+9)-(-18)]

C) -68+{-44+[29-(40-31+9)]}

D) -100+{97-[-(28-37)+(-17-9)]}

Answer 1

a) 9-(-7+15)+(8-19)
= 9-(8)+(-11)
=9-8+(-11)
=1-11
=-10

b)73-[51-(-34+9)-(-18)]
=73-[51-(-25)-(-18)]
=73-[51+25-(-18)]
=73-[76-(-18)]
=73-[76+18]
=73-[94]
=73-94
= -21

C) -68+{-44+[29-(40-31+9)]}
= -68+{-44+[29-(9+9)]}
= -68+{-44+[29-(18)]}
= -68+{-44+[29- 18]}
= -68+{-44+[11]}
= -68+{-44+11}
= -68+{- 33}
= -68 - 33
= -101

d) -100+{97-[-(28-37)+(-17-9)]}
= -100+{97-[-(-9)+(- 26)]}
=  -100+{97-[9-26]}
= -100+{97-[-17]}
=  -100+{97 + 17}
=  -100+ 114
= 14