Question

6) Resolva as seguintes expressões numéricas:
a) 15 - (8 - 7) + (9-4) =
b) 12 -1 - 3+ [1 + (+2-9) - 8] + 5) =​

Answer 1

a 15-(8-7)+(9-4)

15-1+5

15-6=

9

b 12-1-3[1+(2-9)-8]+5

12-1-3[1+7-8]+5

12-1-3+5

11-3+5

9+5=

14