Ответ:
а) \(\frac{7}{12}-\frac{1}{4}=\frac{7}{12}-\frac{3}{12}=\frac{1}{3}\).
б) \(\frac{22}{27}-\frac{5}{9}=\frac{22}{27}-\frac{15}{27}=\frac{7}{27}\).
в) \(\frac{3}{10}-\frac{43}{10000}=\frac{3000}{10000}-\frac{43}{10000}=\frac{2957}{10000}\).
г) \(\frac{31}{100}-\frac{21}{1000}=\frac{310}{1000}-\frac{21}{1000}=\frac{289}{1000}\).
Ответ: а) \(\frac{1}{3}\); б) \(\frac{7}{27}\); в) \(\frac{2957}{10000}\); г) \(\frac{289}{1000}\).
