Question

calcule o valor das seguintes expressoes
20-[-2+[1+(+9-5)-2]+15-9]

Answer 1

20-(-2+(1+(+9-5)-2)+15-9)
20-(-2+(1+(9-5)-2)+15-9)
20-(-2+(1+4-2)+15-9)
20-(-2+(5-2)+15-9)
20-(-2+3+15-9)
20-(1+15-9)
20-(16-9)
20-7
13

Answer 2

20 - [-2 + [1 + (+9 - 5) - 2] + 15 - 9] 20 - [-2 + [1 + 4 - 2] + 15 - 9] 20 - [-2 + 3 + 15 - 9] 20 - 7 = 13