题目内容
(1)
+
=
(2)
+
=
(3)
+
=
(4)
+
=
(5)
+
=
(6)
+
=
(7)
+
+
=
(8)
+
+
+
=
| 1 |
| 7 |
| 3 |
| 7 |
(2)
| 2 |
| 5 |
| 1 |
| 5 |
(3)
| 9 |
| 20 |
| 4 |
| 20 |
(4)
| 6 |
| 43 |
| 16 |
| 43 |
(5)
| 50 |
| 77 |
| 10 |
| 77 |
(6)
| 115 |
| 800 |
| 345 |
| 800 |
(7)
| 3 |
| 9 |
| 4 |
| 9 |
| 1 |
| 9 |
(8)
| 5 |
| 32 |
| 6 |
| 32 |
| 7 |
| 32 |
| 8 |
| 32 |
分析:根据同分母分数加减法的计算方法进行计算.
解答:解:
(1)
+
=
,
(2)
+
=
,
(3)
+
=
,
(4)
+
=
,
(5)
+
=
,
(6)
+
=
,
(7)
+
+
=
,
(8)
+
+
+
=
.
(1)
| 1 |
| 7 |
| 3 |
| 7 |
| 4 |
| 7 |
(2)
| 2 |
| 5 |
| 1 |
| 5 |
| 3 |
| 5 |
(3)
| 9 |
| 20 |
| 4 |
| 20 |
| 13 |
| 20 |
(4)
| 6 |
| 43 |
| 16 |
| 43 |
| 22 |
| 43 |
(5)
| 50 |
| 77 |
| 10 |
| 77 |
| 60 |
| 77 |
(6)
| 115 |
| 800 |
| 345 |
| 800 |
| 23 |
| 40 |
(7)
| 3 |
| 9 |
| 4 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
(8)
| 5 |
| 32 |
| 6 |
| 32 |
| 7 |
| 32 |
| 8 |
| 32 |
| 13 |
| 16 |
点评:同分母分数相加减,分母不变,只把分子相加减.
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