Вычислите:1-1/8:6;1-7/15:5;1-3/10:2

Найдем значения выражения:

1) 1 - 1/8 : 6 = 1 - 1/8 * 1/6 = 1 - 1/(8 * 6) = 1 - 1/48 = 48/48 - 1/48 = (48 - 1)/48 = 47/48;

2) 1 - 7/15 : 5 = 1 - 7/15 * 1/5 = 1 - 7/(15 * 5) = 1 - 7/75 = (1 * 75 - 7 * 1)/75 = (75 - 7)/75 = 68/75;

3) 1 - 3/10 : 2 = 1 - 3/10 * 1/2 = 1 - 3/(10 * 2) = 1 - 3/20 = 20/20 - 3/20 = (20 - 3)/20 = 17/20.