Вопрос:

День 2 1/4 - 1/8 11/30 + 3/4 5/8 - 5/12 11/65 + 2/13 0,6 + 2/5 3 1/2 - 1 1/4 1 2/4 + 1/2 2,2 + 4/5 6 - 1 5/7 4 1/6 - 2 5/6 11/14 + 2 5/14 8 - 5 7/8 2 1/9 - 1 1/3 1 4/5 + 0,3 3 1/6 - 2 1/12 e) 4,92 - (0,025 + 0,001): 0,01; ж) 5,64 + 9,036 : 1,8 - 0,86; 3) 19,02 - 0,85 · 4,24 + 4,584; и) 7,2 - 4,06 + 3,15 : 0,6; к) 3,078 : (5,1 - 1,05) + 0,24. =

Ответ:

Решение:

  1. \( \frac{1}{4} - \frac{1}{8} = \frac{2}{8} - \frac{1}{8} = \frac{1}{8} \)
  2. \( \frac{11}{30} + \frac{3}{4} = \frac{22}{60} + \frac{45}{60} = \frac{67}{60} = 1 \frac{7}{60} \)
  3. \( \frac{5}{8} - \frac{5}{12} = \frac{15}{24} - \frac{10}{24} = \frac{5}{24} \)
  4. \( \frac{11}{65} + \frac{2}{13} = \frac{11}{65} + \frac{10}{65} = \frac{21}{65} \)
  5. \( 0,6 + \frac{2}{5} = \frac{6}{10} + \frac{4}{10} = \frac{10}{10} = 1 \)
  6. \( 3 \frac{1}{2} - 1 \frac{1}{4} = 3 \frac{2}{4} - 1 \frac{1}{4} = 2 \frac{1}{4} \)
  7. \( 1 \frac{2}{4} + \frac{1}{2} = 1 \frac{1}{2} + \frac{1}{2} = 2 \)
  8. \( 2,2 + \frac{4}{5} = 2 \frac{2}{10} + \frac{8}{10} = 2 \frac{10}{10} = 3 \)
  9. \( 6 - 1 \frac{5}{7} = 5 \frac{7}{7} - 1 \frac{5}{7} = 4 \frac{2}{7} \)
  10. \( 4 \frac{1}{6} - 2 \frac{5}{6} = 3 \frac{7}{6} - 2 \frac{5}{6} = 1 \frac{2}{6} = 1 \frac{1}{3} \)
  11. \( 1 \frac{11}{14} + 2 \frac{5}{14} = 3 \frac{16}{14} = 3 \frac{8}{7} = 4 \frac{1}{7} \)
  12. \( 8 - 5 \frac{7}{8} = 7 \frac{8}{8} - 5 \frac{7}{8} = 2 \frac{1}{8} \)
  13. \( 2 \frac{1}{9} - 1 \frac{1}{3} = 2 \frac{1}{9} - 1 \frac{3}{9} = 1 \frac{10}{9} - 1 \frac{3}{9} = \frac{7}{9} \)
  14. \( 1 \frac{4}{5} + 0,3 = 1 \frac{4}{5} + \frac{3}{10} = 1 \frac{8}{10} + \frac{3}{10} = 1 \frac{11}{10} = 2 \frac{1}{10} \)
  15. \( 3 \frac{1}{6} - 2 \frac{1}{12} = 3 \frac{2}{12} - 2 \frac{1}{12} = 1 \frac{1}{12} \)
  16. e) \( 4,92 - (0,025 + 0,001) : 0,01 = 4,92 - 0,026 : 0,01 = 4,92 - 2,6 = 2,32 \)
  17. ж) \( 5,64 + 9,036 : 1,8 - 0,86 = 5,64 + 5,02 - 0,86 = 10,66 - 0,86 = 9,8 \)
  18. з) \( 19,02 - 0,85 \cdot 4,24 + 4,584 = 19,02 - 3,504 + 4,584 = 15,516 + 4,584 = 20,1 \)
  19. и) \( 7,2 - 4,06 + 3,15 : 0,6 = 7,2 - 4,06 + 5,25 = 3,14 + 5,25 = 8,39 \)
  20. к) \( 3,078 : (5,1 - 1,05) + 0,24 = 3,078 : 4,05 + 0,24 = 0,76 + 0,24 = 1 \)

Ответ: 1/8; 1 7/60; 5/24; 21/65; 1; 2 1/4; 2; 3; 4 2/7; 1 1/3; 4 1/7; 2 1/8; 7/9; 2 1/10; 1 1/12; 2,32; 9,8; 20,1; 8,39; 1.