Пошаговое объяснение:
1)
-с = 8 5/12 - 8,25 = 8 5/12 - 8 25/100 = 8 5/12 - 8 1/4 = 8 5/12 - 8 3/12 = 2/12 = 1/6
2)
-с = 13 4/7 : 3 13/21 + 6,25 = 95/7 : 76/21 + 6,25 = 95/7 * 21/76 + 6,25 = 95/1 * 3/76 + 6,25 = 285/76 + 6,25 = 3,75 + 6,25 = 10
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Пошаговое объяснение:
1)
-с = 8 5/12 - 8,25 = 8 5/12 - 8 25/100 = 8 5/12 - 8 1/4 = 8 5/12 - 8 3/12 = 2/12 = 1/6
2)
-с = 13 4/7 : 3 13/21 + 6,25 = 95/7 : 76/21 + 6,25 = 95/7 * 21/76 + 6,25 = 95/1 * 3/76 + 6,25 = 285/76 + 6,25 = 3,75 + 6,25 = 10