Question

Calcule a expressao numerica 2+{+8-[-5-(7-2)]-7}

Answer 1

2+{8-[-5-5]-7}
2+[8-[-10]-7}
2+[8+10-7}
2+[11]
= 13

Answer 2

   2 + { + 8 – [ – 5 – (7 – 2)] – 7}
= 2 + {8 – [ – 5 – 5] – 7}
= 2 + {8 – [ – 10] – 7}
= 2 + {8 + 10 – 7}
= 2 + {18 – 7}
= 2 + 11
= 13