2 - (55/8-22/3) : 3/4 найти значение выражение

2 - (55/8 - 22/3) : 3/4 = 2 - (-3/8) : 3/4 = 2 + 3/8 * 4/3 = 2 + 4/8 = 2 + 1/2 = 2 * 2/2 + 1/2 = 4/2 + 1/2 = 5/2;

Во первых делаем убавку внутри скобки.

1) 55/8 - 22/3 = 55/8 * 3/3 - 22/3 * 8/8 = 165/24 - 176/24 = - 9/24 = - 3/8;

2) - 3/8 : 3/4 = - 3/8 * 4/3 = - 4/8 = - 1/2;

3) 2 - (-1/2) = 2 + 1/2 = 2 * 2/2 + 1/2 = 4/2 + 1/2 = 5/2 = 2 целых 1/2;

Второй вариант.

2 - (6,875 - 7,3) : 0,75 = 2 - (-0,425) : 0,75 = 2 + 0,56 = 2,56 = 2,6.

1) 6,875 - 7,3 = - 0,425;

2) - 0,425 : 0,75 = 0,56;

3) 2 + 0,56 = 2,56 = 2,6.