1 сравни а) 7\10 и 31\45 б) 7\16 и 7\14 в)37\36

1. Сравним:
а) 7/10 gt; 31/45.
    7/10 = 0,7.
    31/45 = 0,69.
б) 7/16 lt; 7/14.
    7/16 = 0.4375.
    7/14 = 0.5.
в) 37/36 gt; 0,72.
    37/36 = 1.028.

2. Найдем значения выражений:
а) 7 - 4 5/9 = (243 - 41)/9 = 202/9 = 22 4/9.
    7 = 6 9/9 = (6 * 9 + 9)/9 = 243/9.
    4 5/9 = (4 * 9 + 5)/9 = 41/9.
б) 4 3/10 + 1 5/13 = (559 + 180)/130 = 739/130 = 5 89/130.
    4 3/10 = (4 * 10 + 3)/10 = 43/10.
    1 5/13 = (1 * 13 + 5)/13 = 18/13.
в) 6 15/21 + 2 9/14 = (94 + 37)/14 = 131/14 = 9 5/14.
    6 15/21 = (6 * 21 +15)/21 = 141/21 сократим на 3 = 47/7.
    2 9/14 = (2 * 14 + 9)/14 = 37/14.
г) 5 1/5 - 3 3/4 = (104 - 75)/20 = 29/20 = 1 9/20.
    5 1/5 = (5 * 5 + 1)/5 = 26/5.
    3 3/4 = (3 * 4 + 3)/4 = 15/4.