12) вычислить 4/7 + 3/7 - 3 * (7/24 - 5/16) : 4/5

Question

4/7 + 3/7 = 7/7 = 1.
7/24 - 5/16 = (14 - 15) / 48 = -1/48.
(-1/48) : 4/5 = -1/48 * 5/4 = -5/192.
1 - (-5/192) = 1 + 5/192 = 197/192.

Accepted Answer

4/7 + 3/7 = 7/7 = 1.
7/24 - 5/16 = (14 - 15) / 48 = -1/48.
(-1/48) : 4/5 = -1/48 * 5/4 = -5/192.
1 - (-5/192) = 1 + 5/192 = 197/192.

Ответ: