Question

15. Suprime los signos de agrupación y resuelve
a. 300 – [70 + (– 4 – 20 –10)] =
b. 12 + {4 – [– 15 – (1 + 2) – 10]} =

Answer 1

a. 300 – [70 + (– 4 – 20 –10)] =

300- 70 + 24 - 34

230 + -10 =220

b. 12 + {4 – [– 15 – (1 + 2) – 10]} =

12+4-15-1-10

8-16-10

24-10=14