раскройте скобки и найдите значение выражения. 1)-2/9+(2/9-3/4); 2)4/7-(5/11-3/7); 3)3 5/6+(-5/6-1/7); 4)3/8-(1/9-5/8); 5)2 3/4-(1 1/4+5 1/2); 6)6 5/8-(1 3/4-2 3/8).

Ответ:

Пошаговое объяснение:

1)-2/9+(2/9-3/4) = -2/9 + 2/9 - 3/4 = 3/4;

2)4/7-(5/11-3/7) = 4/7 - 5/11 + 3/7 = 1 - 5/11 = 6/11;

3)3 5/6+(-5/6-1/7) = 3 5/6 - 5/6 - 1/7 = 3 - 1/7 = 2 6/7;

4)3/8-(1/9-5/8) = 3/8 - 1/9 + 5/8 = 1 - 1/9 = 8/9;

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

6)6 5/8-(1 3/4-2 3/8) = 6 5/8 - 1 3/4 + 2 3/8 = 9 - 1 3/4 = 7 1/4