Question

Предварительно сократив дроби,выполните их сложение::28/40+10/75,12/27+14/21,12/18+5/60,4/24+3/36.Помоги мне прошу.

Answer 1

28/40+10/75 = 7/10 + 2/15 = 21/30 + 4/30 = 25/30 = 5/6
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12/27+14/21 = 4/9 + 2/3 = 4/9 + 6/9 = 10/9 = 1 1/9
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12/18+5/60 = 2/3 + 1/12 = 8/12 +1/12 = 9/12 = 3/4
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4/24+3/36 = 1/6 + 1/12 = 2/12 + 1/12 = 3/12 = 1/4