Найди значение дробного выражения (1 3/4+3,5)/0,75 ----------------------- (5,8+4,2)/1,25 (1,5+2 2/3)/3,75 -----------------------

(1 3/4 + 3,5) / 0,75 = (1,75 + 3,5) / 0,75 = 5,25 / 0,75 = 7;

Ответ: 7.

(5,8 + 4,2) / 1,25 = 10 / 1,25 = 8;

Ответ: 8.

(1,5 + 2 2/3) / 3,75 = (3/2 + 8/3) / 3,75 = (3 * 3 + 8 * 2)/6 / 3,75 = (9 + 16)/6 / 3,75 = 25/6 / 3,75 = 25/6 / 375/100 = 25/6 * 100/375 = 25/6 * 4/15 = 5/3 * 2/3 = 10/9 = 1 1/9;

Ответ: 1 1/9.

(2 5/18 - 1,5) / 3 1/2 = (41/18 - 15/10) / 7/2 = (41/18 - 3/2) / 7/2 = (41 * 1 - 3 * 9)/18 / 7/2 = (41 - 27)/18 / 7/2 = 14/18 : 7/2 = 7/9 * 2/7 = 2/9.

Ответ: 2/9.