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Прочитать учебник А.П. Киселёва "Арифметика"
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The author does not write in the goal 3 years 7 months 17 days
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Russia
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Хочу выучить математику и понять её красоту .
Начинаю с самых азов, для понимания математики и изучения её последовательно .
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