1. (1/3) + (2/5) =
2. (3/4) - (1/6) =
3. (5/7) + (3/8) =
4. (4/9) - (1/10) =
5. (1/2) + (1/3) + (1/4) =
6. (3/4) + (2/3) - (1/6) =
7. (2/3) + (1/4) - (1/6) =
8. (5/6) - (3/8) + (1/9) =
9. (1/2) + (1/4) + (1/6) + (1/8) =
10. (2/3) + (4/5) - (3/7) =
注意：在进行分数加减法时，先通分（将分母化为相同的数），再按整数加减法的法则进行计算。
