Домашнее задание. 3. Вычислите: 1) 3/10 + 5/12; 2) 23/24 − 7/16; 3) 1 4/15 + 3 7/25; 4) 9 11/12 − 5 3/8.

1) \(\frac{3}{10}+\frac{5}{12}=\frac{18}{60}+\frac{25}{60}=\frac{43}{60}\).

2) \(\frac{23}{24}-\frac{7}{16}=\frac{46}{48}-\frac{21}{48}=\frac{25}{48}\).

3) \(1\frac{4}{15}+3\frac{7}{25}=4+\frac{20}{75}+\frac{21}{75}=4\frac{41}{75}\).

4) \(9\frac{11}{12}-5\frac{3}{8}=4+\frac{22}{24}-\frac{9}{24}=4\frac{13}{24}\).

Ответ: 1) \(\frac{43}{60}\); 2) \(\frac{25}{48}\); 3) \(4\frac{41}{75}\); 4) \(4\frac{13}{24}\).