20,9 -13 целых 7/10 и 6 целых 8/25+1,28

Question

20,9 -13 целых 7/10 и 6 целых 8/25+1,28

Answer 1

20,9 - 13  7\10 = 209\10 - 137\10 = 72\10 = 7,2

6  8\25 + 1,28 = 158\25 + 128\100 = 632+128 \ 100 = 760/100 = 7,6

Answer 2

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