4) 43 + (-60) + 12 +39 + (-21)

Question

Вопрос:

Ответ:

Accepted Answer

43 + (-60) + 12 + 39 + (-21) = 43 - 60 + 12 + 39 - 21 = -17 + 12 + 39 - 21 = -5 + 39 - 21 = 34 - 21 = 13