题目内容
计算下面各题．  = |   = |   = |   = |
 + = |   = |   = |  = |
 = |
解：
分析：利用分数的运算规则：相同分母的分数相加减，分母不变，分子直接相加减．
点评：此题考查了相同分母分数的加减法法则．
= | = | = | = |
+= | = | =1 | =1 |
| =1 |
分析：利用分数的运算规则：相同分母的分数相加减，分母不变，分子直接相加减．
点评：此题考查了相同分母分数的加减法法则．
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题目内容
| 计算下面各题．= | = | = | = |
| += | = | = | = |
| = |
| = | = | = | = |
| += | = | =1 | =1 |
| =1 |