Ответ:

  1. 3 1/6 + 1 1/18 = 4 + 4/18 = 4 2/9.
  2. 2 3/7 − 1 4/7 = 1 10/7 − 1 4/7 = 5/7.
  3. 1,3 + 1 1/2 = 1,3 + 1,5 = 2,8.
  4. 2 1/3 − 1/6 = 2 2/6 − 1/6 = 2 1/6.
  5. 4 5/14 + 1 9/14 = 5 + 14/14 = 6.
  6. 3 1/2 − 1 1/4 = 3 2/4 − 1 1/4 = 2 1/4.
  7. 1 2/4 + 1/2 = 2.
  8. 2,2 + 4/5 = 2,2 + 0,8 = 3.
  9. 6 − 1 5/7 = 5 7/7 − 1 5/7 = 4 2/7.
  10. 4 1/6 − 2 5/6 = 3 7/6 − 2 5/6 = 1 1/3.
  11. 2 1/8 − 1 1/4 = 2 1/8 − 1 2/8 = 7/8.
  12. 1 3/5 + 0,5 = 1,6 + 0,5 = 2,1.
  13. 5 1/7 − 3 1/14 = 5 2/14 − 3 1/14 = 2 1/14.
  14. 4 − 8 4/9 = −4 4/9.
  15. 3 7/15 + 1 8/15 = 4 + 15/15 = 5.