1) (3 1/5 - 1 2/3) * 15 = 23
2) (2 3/7 + 1 1/2) : 5/7 = 5 1/2 или 5,5
3) (5 2/5 + 9 1/6) : 9 32/45 = 1 1/2 или 1,5
4) (10 - 2 2/3) : 4 8/9 = 7 1/3
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Answers & Comments
1) (3 1/5 - 1 2/3) * 15 = 23
2) (2 3/7 + 1 1/2) : 5/7 = 5 1/2 или 5,5
3) (5 2/5 + 9 1/6) : 9 32/45 = 1 1/2 или 1,5
4) (10 - 2 2/3) : 4 8/9 = 7 1/3