Числовые равенства и их свойства. Урок 1
(12 – 6) : (–3) = 2
(9 + 6) : 3 = 8
(–2 + 3) : 4 = 8 : 2
(–2020 + 2020) : 5 = 5 ∙ (–2021 + 2021)
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