Ответ:
15/20=3/4
24/40=6/10
3/10 и 2/3 :
9/30 и 20/30
4/5 и 4/9:
36/45 и 20/45
4 7/9 - 1 2/3 + 1/6 = 4 14/18 - 1 12/18 + 3/18 = 3 5/18
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Ответ:
15/20=3/4
24/40=6/10
3/10 и 2/3 :
9/30 и 20/30
4/5 и 4/9:
36/45 и 20/45
4 7/9 - 1 2/3 + 1/6 = 4 14/18 - 1 12/18 + 3/18 = 3 5/18