Вычислите значение выражения, используя распределительное свойство умножения: 1) 43 х 64 + 43 х 23 - 87 х 33 2)84 х 53 - 84 х 28 + 16 х 61 - 16 х 36 и да, со столбиками плез : 3

rada182 rada182    3   14.09.2019 22:40    0

Ответы
golovkosofia868 golovkosofia868  07.10.2020 15:25
43 * 64 + 43 * 23 - 87 * 33 = 43*(64 +23) -87*33 = \\ \\ =43*87 -87*33 = 87*(43-33) = 87*10 = 870

2) 84 * 53 - 84 * 28 + 16 * 61 - 16 * 36 = \\ \\ = 84*(53-28) + 16*(61-36) = \\ \\ 84*25 + 16* 25 = 25*(84+16) = 25* 100 = 2500

Умножать столбиком не пришлось, а сложение и вычитание затруднений не должно вызывать.
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nikvet nikvet  22.10.2020 17:25
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