Умножение 4х значного на однозначное число
С помощью ментальной арифметики
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![[Евгений Народницкий] Алгебра 7. Урок 4 - Формулы сокращенного умножения и как их запомнить.](https://sun9-72.userapi.com/c854016/v854016368/95a2e/lzoHwNGG2Zk.jpg)
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8 years ago 00:12:30 3.7K
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2 years ago 00:01:01 78.9K
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![[Евгений Народницкий] Алгебра 8. Урок 4 - Умножение и деление дробей](https://sun9-44.userapi.com/c855536/v855536381/161d35/D0_my3uydfk.jpg)
7 years ago 00:00:25 594
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