题目内容
计算:
+
+
+
+
+
+
+
+
+
=
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 64 |
| 1 |
| 128 |
| 1 |
| 256 |
| 1 |
| 512 |
| 1 |
| 1024 |
| 1031 |
| 1024 |
| 1031 |
| 1024 |
分析:根据异分母分数相加,先通分,可得同分母分数,再根据有理数的加法,可得答案.
解答:解:原式=
+
+
+
+
+
+
+
+
+
=
| 512 |
| 1024 |
| 256 |
| 1024 |
| 128 |
| 1024 |
| 64 |
| 1024 |
| 32 |
| 1024 |
| 16 |
| 1024 |
| 8 |
| 1024 |
| 4 |
| 1024 |
| 2 |
| 1024 |
| 1 |
| 1024 |
=
| 1031 |
| 1024 |
点评:本题考查了有理数的加法,先通分,再加减.
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