1) 1/7 - 2/21 + 1/8 + 3/4 = ?
2) 3/5 + 1/5 + 7/15 - 3/15 = ? 3) 7/12 - 5/12 + 5/6 - 4/6 = ? ПЖ СРОЧННООО
2) 3/5 + 1/5 + 7/15 - 3/15 = ? 3) 7/12 - 5/12 + 5/6 - 4/6 = ? ПЖ СРОЧННООО
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Ответ:
Пошаговое объяснение:
1) 1/7 - 2/21 + 1/8 + 3/4 =
3/21 - 2/21 + 1/8 + 6/8 =
1/21 + 7/8 = 8/168 + 147/168 = 155/168
2) 3/5 + 1/5 + 7/15 - 3/15 =
4/5 + 7/15 - 3/15 =
12/15 + 7/15 - 3/15 = 16/15 =
1. 1/15
3) 7/12 - 5/12 + 5/6 - 4/6 =
2/12 + 1/6 = 1/6 + 1/6 = 2/6 = 1/3