题目
27÷
| 9 |
| 4 |
提问时间：2020-06-28
答案
原式=27×
×（-
）+4+
=-
+4+
=-4+4
=0．
| 4 |
| 9 |
| 4 |
| 9 |
| 4 |
| 3 |
=-
| 16 |
| 3 |
| 4 |
| 3 |
=-4+4
=0．
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