выполните сложение
9 цел 13/16+23;
10 цел 9/13 +8 цел 3/13;
2 цел 5/22 + 8 цел 15/22;

найдите значения выражений:
4 цел 121/300+7 цел 199/300
4 цел 253/540+18 цел 307/540
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