September 2021 2 8 Report
Замените числа ближайшими десятками и вычислите приближенно.Сравните результаты. 27+51 и 17+39 48+25 и 52-15 43-19 и 28+19 19+45 и 79-18 69-22 и 55+33 15+47 и 18+39
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