Найдите значение суммы 1) - 5/12+3/8 2) 7/15 + (-2/5) 3) - 1/8+3/5 4) 5/8 + (-1/4) 5) - 3/5+2/2 6) 5/16 + (-2/3)

Первый пример.

-5/12 + 3/8 = - 5 * 8/12 * 8 + 3 * 12/8 * 12 = - 40/96 + 36/96 = - 40 + 36/96 = - 4/96 = - 1 * 4/24 * 4 = - 1/24;

Второй пример.

7/15 + (-2/5) = 7 * 5/15 * 5 - 2 * 15/5 * 15 = 35/75 - 30/75 = 35 - 30/75 = 5/75 = 1 * 5/15 * 5 = 1/15;

Третий пример.

-1/8 + 3/5 = - 1 * 5/8 * 5 + 3 * 8/5 * 8 = - 5/40 + 24/40 = - 5 + 24/40 = 19/40;

Четвертый пример.

5/8 + (-1/4) = 5 * 4/8 * 4 - 1 * 8/4 * 8 = 20/32 - 8/32 = 20 - 8/32 = 12/32 = 3 * 4/8 * 4 = 3/8;

Пятый пример.

-3/5 + 2/2 = - 2 * 3/2 * 5 + 5 * 2/5 * 2 = - 6/10 + 10/10 = - 6 + 10/10 = 4/10 = 2 * 2/5 * 2 = 2/5;

Шестой пример.

5/16 + (-2/3) = 5 * 3/16 * 3 - 2 * 16/3 * 16 = 15/48 - 32/48 = 15 - 32/48 = - 17/48.