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

Resposta :

Resposta:

30 – (18 + 19) – [13 – (14 – 21)]

30-37-[13+7]

-7-13+7

-20+7

-13

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