Question

Resolva as expressões numéricas:
A)
20+[ 15-(11-18+5) ]

B) - 10+{-5+[ (8+15) +1 ] - 20}

Answer 1

A) 20+[ 15-(11-18+5) ]
20 + [ 15 - ( - 7 + 5)]
20 + [ 15 - ( - 2)]
20 + [ 15 + 2]
20 + 17
37

B)- 10+{-5+[ (8+15) +1 ] - 20}
- 10 + { - 5 + [ 23 + 1] - 20}
- 10 + { - 5 + 24 - 20}
- 10 + { 19 - 20}
- 10 + { - 1}
- 10 - 1
- 11