【100道异分母分数加减法含答案】在小学数学学习中，异分母分数的加减法是学生必须掌握的重要知识点。由于分母不同，直接相加或相减是不成立的，因此需要先找到它们的公分母，再将分数转化为同分母后进行运算。为了帮助学生更好地理解和练习，下面整理了100道异分母分数加减法题目，并附上详细答案。
一、题目与答案汇总（表格形式）
| 序号 | 题目 | 答案 |
| 1 | 1/2 + 1/3 | 5/6 |
| 2 | 1/4 + 1/5 | 9/20 |
| 3 | 2/3 + 1/6 | 5/6 |
| 4 | 3/4 - 1/8 | 5/8 |
| 5 | 1/2 - 1/5 | 3/10 |
| 6 | 2/5 + 3/10 | 7/10 |
| 7 | 3/7 + 2/14 | 4/7 |
| 8 | 5/6 - 1/3 | 1/2 |
| 9 | 1/3 + 1/4 | 7/12 |
| 10 | 2/7 + 3/14 | 7/14 = 1/2 |
| 11 | 3/8 + 1/4 | 5/8 |
| 12 | 4/5 - 1/10 | 7/10 |
| 13 | 1/2 + 2/5 | 9/10 |
| 14 | 3/5 - 1/10 | 1/2 |
| 15 | 2/3 + 1/9 | 7/9 |
| 16 | 5/6 - 1/4 | 7/12 |
| 17 | 1/5 + 1/10 | 3/10 |
| 18 | 2/5 + 3/10 | 7/10 |
| 19 | 3/4 - 1/6 | 7/12 |
| 20 | 1/2 + 3/8 | 7/8 |
| 21 | 2/3 + 1/6 | 5/6 |
| 22 | 5/8 - 1/4 | 3/8 |
| 23 | 1/3 + 1/6 | 1/2 |
| 24 | 4/5 - 1/2 | 3/10 |
| 25 | 2/7 + 3/14 | 7/14 = 1/2 |
| 26 | 3/5 + 1/10 | 7/10 |
| 27 | 1/2 - 1/6 | 1/3 |
| 28 | 2/5 + 1/10 | 1/2 |
| 29 | 3/4 + 1/8 | 7/8 |
| 30 | 5/6 - 1/2 | 1/3 |
| 31 | 1/3 + 2/9 | 5/9 |
| 32 | 2/5 - 1/10 | 3/10 |
| 33 | 3/7 + 2/14 | 4/7 |
| 34 | 1/2 + 1/5 | 7/10 |
| 35 | 4/5 + 1/10 | 9/10 |
| 36 | 5/6 - 1/3 | 1/2 |
| 37 | 1/4 + 1/8 | 3/8 |
| 38 | 2/3 - 1/6 | 1/2 |
| 39 | 3/4 + 1/6 | 11/12 |
| 40 | 1/2 + 3/5 | 11/10 |
| 41 | 2/7 + 3/14 | 7/14 = 1/2 |
| 42 | 3/5 - 1/10 | 1/2 |
| 43 | 1/3 + 1/9 | 4/9 |
| 44 | 4/7 - 1/14 | 7/14 = 1/2 |
| 45 | 2/5 + 1/10 | 1/2 |
| 46 | 5/8 - 1/4 | 3/8 |
| 47 | 1/2 + 2/3 | 7/6 |
| 48 | 3/4 - 1/8 | 5/8 |
| 49 | 2/3 + 1/6 | 5/6 |
| 50 | 1/5 + 1/10 | 3/10 |
| 51 | 3/5 + 1/10 | 7/10 |
| 52 | 2/3 - 1/6 | 1/2 |
| 53 | 1/2 + 3/4 | 5/4 |
| 54 | 4/5 - 1/10 | 7/10 |
| 55 | 3/7 + 2/14 | 4/7 |
| 56 | 1/3 + 1/6 | 1/2 |
| 57 | 2/5 + 1/10 | 1/2 |
| 58 | 5/6 - 1/2 | 1/3 |
| 59 | 1/4 + 1/5 | 9/20 |
| 60 | 2/3 + 1/9 | 7/9 |
| 61 | 3/4 + 1/8 | 7/8 |
| 62 | 1/2 - 1/5 | 3/10 |
| 63 | 2/5 + 3/10 | 7/10 |
| 64 | 3/5 - 1/10 | 1/2 |
| 65 | 1/3 + 1/4 | 7/12 |
| 66 | 5/6 - 1/3 | 1/2 |
| 67 | 2/7 + 3/14 | 7/14 = 1/2 |
| 68 | 4/5 + 1/10 | 9/10 |
| 69 | 1/2 + 1/3 | 5/6 |
| 70 | 3/8 - 1/4 | 1/8 |
| 71 | 2/5 + 1/10 | 1/2 |
| 72 | 5/6 - 1/4 | 7/12 |
| 73 | 1/3 + 2/9 | 5/9 |
| 74 | 3/4 - 1/6 | 7/12 |
| 75 | 1/2 + 3/5 | 11/10 |
| 76 | 2/3 - 1/6 | 1/2 |
| 77 | 3/5 + 1/10 | 7/10 |
| 78 | 1/4 + 1/8 | 3/8 |
| 79 | 4/5 - 1/10 | 7/10 |
| 80 | 2/7 + 3/14 | 7/14 = 1/2 |
| 81 | 1/3 + 1/6 | 1/2 |
| 82 | 5/6 - 1/2 | 1/3 |
| 83 | 2/3 + 1/6 | 5/6 |
| 84 | 1/5 + 1/10 | 3/10 |
| 85 | 3/4 + 1/8 | 7/8 |
| 86 | 3/7 + 2/14 | 4/7 |
| 87 | 1/2 + 2/5 | 9/10 |
| 88 | 2/5 - 1/10 | 3/10 |
| 89 | 4/5 + 1/10 | 9/10 |
| 90 | 5/6 - 1/3 | 1/2 |
| 91 | 1/3 + 1/9 | 4/9 |
| 92 | 2/3 + 1/6 | 5/6 |
| 93 | 1/2 + 1/4 | 3/4 |
| 94 | 3/5 - 1/10 | 1/2 |
| 95 | 1/2 - 1/6 | 1/3 |
| 96 | 2/5 + 3/10 | 7/10 |
| 97 | 3/4 - 1/6 | 7/12 |
| 98 | 1/3 + 1/6 | 1/2 |
| 99 | 5/8 - 1/4 | 3/8 |
| 100 | 2/3 + 1/9 | 7/9 |
二、总结
通过以上100道异分母分数加减法练习题，可以帮助学生巩固分数的基本运算能力，特别是对通分和约分的理解。建议在做题过程中多使用画图、找最小公倍数等方法，逐步提升解题速度和准确率。同时，家长或老师可以定期检查学生的练习情况，及时发现并纠正错误，从而提高整体数学水平。
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