Ответ:
Пошаговое объяснение:
3 1/4 + 2 2/3 = 3 3/12 + 2 8/12 = 5 11/12
5 - 1 5/6 = 4 6/6 - 1 5/6 = 3 1/6
6 1/3 + 2 1/15 - 4 7/9 = 6 5/15 + 2 1/15 - 4 7/9 = 8 6/15 - 4 7/9 = 8 18/45 - 4 35/45 = 7 63/45 - 4 35/45 = 3 28/45
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2 5/7 + x = 4 1/2
x = 4 1/2 - 2 5/7
x = 4 7/14 - 2 10/14
x = 3 21/14 - 2 10/14
x = 1 11/14
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x - 2 3/5 = 1 11/15
x = 1 11/15 + 2 3/5
x = 1 11/15 + 2 9/15
x = 3 20/15
x = 4 1/3