99 +14 465. Выполните рациональным способом сложение: 80 40 160 13 19 1) 8 7 +9 22 20 17 21+5 30 ; 2) 21 13 4 20 30 + 9 35 +24 21 35 21 466. Решите уравнения: +115 *1211 +5 1). ДАМ 20БАЛЛОВ!!!!!​
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