Tính
Tính:
- C) 3/4 - 5/-8 + -1/2
- D)1/2+1/-3 + 1/4 - -1/6
- A)1/3+3/8-7/2
- B)-3/14 +5/8-1/12
- C)1/4+5/12-1/13-7/2
- D)1/4-2/3-11/18