z = 13, 12; n = 24, 25
z - n = 13, 12 - 24, 25 = -11, 13
z = 35,7; n = 64, 8
z - n = 35,7 - 64, 8 = -29,1
z = \frac{3}{4}; n = \frac{4}{5}
z - n = \frac{3}{4} - \frac{4}{5} = \frac{15}{20} - \frac{16}{20} = - \frac{1}{20}
Ответ: 1. -11,13; 2. -29,1; 3. - \frac{1}{20}