7-3/8=6ц 8/8-3/8=6ц 5/8
7ц 5/9-2ц 8/9=5ц 5/9-8/9= 50/9-8/9=42/9=4ц 6/9=4ц 2/3
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7 5/9 - 2 8/9 = 68/9 - 26/9 = 42/9 = 4 6/9 = 4 2/3
7-3/8=6ц 8/8-3/8=6ц 5/8
7ц 5/9-2ц 8/9=5ц 5/9-8/9= 50/9-8/9=42/9=4ц 6/9=4ц 2/3