题目内容
脱式计算.
+
-
-
+
+(
-
)
| 5 |
| 6 |
| 7 |
| 12 |
| 5 |
| 8 |
| 6 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
| 7 |
| 10 |
| 2 |
| 3 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:①②先通分再按照同分母分数的计算法则进行计算即可.
③去掉括号运用加法的交换律及结合律进行计算即可.
③去掉括号运用加法的交换律及结合律进行计算即可.
解答:
解:①
+
-
=
+
-
=
②
-
+
=
-
+
=
③
+(
-
)
=
-
+
=
| 5 |
| 6 |
| 7 |
| 12 |
| 5 |
| 8 |
=
| 20 |
| 24 |
| 14 |
| 24 |
| 15 |
| 24 |
=
| 19 |
| 24 |
②
| 6 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 24 |
| 20 |
| 15 |
| 20 |
| 5 |
| 20 |
=
| 7 |
| 10 |
③
| 2 |
| 3 |
| 7 |
| 10 |
| 2 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 3 |
| 7 |
| 10 |
=
| 7 |
| 10 |
点评:本题运用分数的加减法的计算法则进行计算即可,关键要理解最简分数和分数的加减法.
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