| 5 |
| 5 |
| 2 |
| 2 |
=7
| 5 |
| 2 |
45+45?8+42．
4
+
?
+4
．
| 5 |
| 45 |
| 8 |
| 2 |
數(shù)學(xué)人氣：288 ℃時(shí)間：2020-05-09 18:30:11
優(yōu)質(zhì)解答
原式=4
+3
-2
+4
，
=7
+2
．
=7
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