52. Выполните вычитание: 1) 3 1/18 − 1/9; 2) 3 17/27 − 2 13/18; 3) 6 3/8 − 2 5/9; 4) 8 11/42 − 5 43/126; 5) 6 7/45 − 4 7/20; 6) 9 1/21 − 5 16/63.

1. \(3\frac{1}{18}-\frac{1}{9}=3+\frac{1}{18}-\frac{2}{18}=3-\frac{1}{18}=2\frac{17}{18}\).
2. \(3\frac{17}{27}-2\frac{13}{18}=1+\frac{34}{54}-\frac{39}{54}=1-\frac{5}{54}=\frac{49}{54}\).
3. \(6\frac{3}{8}-2\frac{5}{9}=4+\frac{27}{72}-\frac{40}{72}=4-\frac{13}{72}=3\frac{59}{72}\).
4. \(8\frac{11}{42}-5\frac{43}{126}=3+\frac{33}{126}-\frac{43}{126}=3-\frac{10}{126}=2\frac{58}{63}\).
5. \(6\frac{7}{45}-4\frac{7}{20}=2+\frac{28}{180}-\frac{63}{180}=2-\frac{35}{180}=1\frac{29}{36}\).
6. \(9\frac{1}{21}-5\frac{16}{63}=4+\frac{3}{63}-\frac{16}{63}=4-\frac{13}{63}=3\frac{50}{63}\).

Ответ: 1) \(2\frac{17}{18}\); 2) \(\frac{49}{54}\); 3) \(3\frac{59}{72}\); 4) \(2\frac{58}{63}\); 5) \(1\frac{29}{36}\); 6) \(3\frac{50}{63}\).