Question

valor de: 30 – (18 + 19) – [13 – (14 – 21)]

Answer 1

Resposta:

30 – (18 + 19) – [13 – (14 – 21)]

30-37-[13+7]

-7-13+7

-20+7

-13

Answer 2

Resposta:

30 – (18 + 19) – [13 – (14 – 21)]

30 – 37 – [13 – (14 – 21)]

30 – 37 – [13 – (-7)]

30 – 37 – [13 +7]

30 – 37 – 20

-7-20

=-27