52. Выполните вычитание: 1) 3 1/18 - 1/9; 3) 6 3/8 - 2 5/9; 5) 6 7/45 - 4 7/20; 2) 3 17/27 - 2 13/18; 4) 8 11/42 - 5 43/126; 6) 9 1/21 - 5 16/63. 53. Решите уравнение: 1) 8 3/4 - x = 3 5/16; 2) (x - 9 3/7) + 5 8/21 = 6 5/14.

52. Выполните вычитание: 1) $3\frac{1}{18} - \frac{1}{9} = 3\frac{1}{18} - \frac{2}{18} = 2\frac{19}{18} - \frac{2}{18} = 2\frac{17}{18}$ 2) $3\frac{17}{27} - 2\frac{13}{18} = 3\frac{34}{54} - 2\frac{39}{54} = 2\frac{88}{54} - 2\frac{39}{54} = \frac{49}{54}$ 3) $6\frac{3}{8} - 2\frac{5}{9} = 6\frac{27}{72} - 2\frac{40}{72} = 5\frac{99}{72} - 2\frac{40}{72} = 3\frac{59}{72}$ 4) $8\frac{11}{42} - 5\frac{43}{126} = 8\frac{33}{126} - 5\frac{43}{126} = 7\frac{159}{126} - 5\frac{43}{126} = 2\frac{116}{126} = 2\frac{58}{63}$ 5) $6\frac{7}{45} - 4\frac{7}{20} = 6\frac{28}{180} - 4\frac{63}{180} = 5\frac{208}{180} - 4\frac{63}{180} = 1\frac{145}{180} = 1\frac{29}{36}$ 6) $9\frac{1}{21} - 5\frac{16}{63} = 9\frac{3}{63} - 5\frac{16}{63} = 8\frac{66}{63} - 5\frac{16}{63} = 3\frac{50}{63}$ 53. Решите уравнение: 1) $8\frac{3}{4} - x = 3\frac{5}{16}$ $x = 8\frac{3}{4} - 3\frac{5}{16} = 8\frac{12}{16} - 3\frac{5}{16} = 5\frac{7}{16}$ Ответ: $5\frac{7}{16}$ 2) $(x - 9\frac{3}{7}) + 5\frac{8}{21} = 6\frac{5}{14}$ $x - 9\frac{9}{21} + 5\frac{8}{21} = 6\frac{5}{14}$ $x - 4\frac{1}{21} = 6\frac{5}{14}$ $x = 6\frac{5}{14} + 4\frac{1}{21} = 6\frac{15}{42} + 4\frac{2}{42} = 10\frac{17}{42}$ Ответ: $10\frac{17}{42}$