题目内容
选择合适的方法计算.
+
-
-
-
1-(
+
)
| 7 |
| 10 |
| 1 |
| 5 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 6 |
1-(
| 5 |
| 6 |
| 1 |
| 12 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:根据分数加减法的计算方法进行计算即可得到答案.
解答:
解:
+
-
=
+
-
=
;
-
-
=
-
-
=
;
1-(
+
)
=1-(
+
)
=1-
=
.
| 7 |
| 10 |
| 1 |
| 5 |
| 2 |
| 3 |
=
| 21 |
| 30 |
| 6 |
| 30 |
| 20 |
| 30 |
=
| 7 |
| 30 |
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 6 |
=
| 16 |
| 24 |
| 3 |
| 24 |
| 4 |
| 24 |
=
| 3 |
| 8 |
1-(
| 5 |
| 6 |
| 1 |
| 12 |
=1-(
| 10 |
| 12 |
| 1 |
| 12 |
=1-
| 11 |
| 12 |
=
| 1 |
| 12 |
点评:此题主要考查的是分数加减法的运算.
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