题目内容
直接写出得数.
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1-
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考点:分数的加法和减法
专题:计算题
分析:(1)同分母的分数相加减,分母不变,分子相加减;
(2)异分母的分数相加减,先通分,化成同分母的分数,再相加减.
(2)异分母的分数相加减,先通分,化成同分母的分数,再相加减.
解答:
解:(1)
+
=
;
(2)
+
=1;
(3)
-
=
;
(4)
+
=
;
(5)
+
=1;
(6)
-
=
;
(7)
-
=
;
(8)
-
=
;
(9)
+
+
=1
;
(10)1-
-
=
.
| 5 |
| 7 |
| 6 |
| 7 |
| 11 |
| 7 |
(2)
| 1 |
| 8 |
| 7 |
| 8 |
(3)
| 17 |
| 24 |
| 13 |
| 24 |
| 1 |
| 6 |
(4)
| 17 |
| 37 |
| 3 |
| 37 |
| 20 |
| 37 |
(5)
| 3 |
| 7 |
| 4 |
| 7 |
(6)
| 11 |
| 9 |
| 1 |
| 9 |
| 10 |
| 9 |
(7)
| 1 |
| 4 |
| 1 |
| 7 |
| 3 |
| 28 |
(8)
| 11 |
| 10 |
| 3 |
| 8 |
| 29 |
| 40 |
(9)
| 8 |
| 9 |
| 5 |
| 6 |
| 1 |
| 9 |
| 5 |
| 6 |
(10)1-
| 3 |
| 6 |
| 1 |
| 6 |
| 1 |
| 3 |
点评:此题主要考查了分数加、减法的计算方法.注意结果要化成最简分数.
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