Question

cuanto es A) -{15-[18-21-(-10+5)]+10} B) {-(8-5)+20-30} C) -{-[-40+(-70+10)+1]}​

Answer 1

Explicación paso a paso:

A) - {15-[18-21-(-5)]+10}

- {15-[2]+10} = - {23} = - 23

B) {-(8-5)+20-30}

{-3+20-30} = - 13

C) - {-[-40+(-70+10)+1]}

- {-[-40-60+1]} = - {-[-99]} = - 99