Выполните вычитание: 1) 3 1/16 - 1/8; 2) 7 9/20 - 5 17/30; 3) 4 2/7 - 1 4/9; 4) 8 5/36 - 1 43/108.

Решение:

1. \( 3 \frac{1}{16} - \frac{1}{8} = 3 \frac{1}{16} - \frac{2}{16} = 2 \frac{17}{16} - \frac{2}{16} = 2 \frac{15}{16} \)
2. \( 7 \frac{9}{20} - 5 \frac{17}{30} = 7 \frac{27}{60} - 5 \frac{34}{60} = 6 \frac{87}{60} - 5 \frac{34}{60} = 1 \frac{53}{60} \)
3. \( 4 \frac{2}{7} - 1 \frac{4}{9} = 4 \frac{18}{63} - 1 \frac{28}{63} = 3 \frac{81}{63} - 1 \frac{28}{63} = 2 \frac{53}{63} \)
4. \( 8 \frac{5}{36} - 1 \frac{43}{108} = 8 \frac{15}{108} - 1 \frac{43}{108} = 7 \frac{123}{108} - 1 \frac{43}{108} = 6 \frac{80}{108} = 6 \frac{20}{27} \)

Ответ: 1) \( 2 \frac{15}{16} \), 2) \( 1 \frac{53}{60} \), 3) \( 2 \frac{53}{63} \), 4) \( 6 \frac{20}{27} \).