Question

1) suprime primero los signos de agrupación y luego resuelve: a) 20-8-{17-3+24-[5+2-11-7]-3+(9-12+3-1)}​

Answer 1

20-8-{17-3+24-[5+2-11-7]-3+(9-12+3-1)} = 20-8-{17-3+24-[5+2-11-7]-3+(-1)} = 20-8-{17-3+24-[-11]-3+(-1)} = 20-8-{17-3+24+11-3-1} = 20-8-{45}

= 20-8-45 = 12 - 45 = -33