题目内容
计算：(5
+4
)÷(1
+1
)=______．
| 2 |
| 7 |
| 1 |
| 9 |
| 1 |
| 9 |
| 3 |
| 7 |
(5
+4
)÷(1
+1
)
=9
÷2
，
=
×
，
=
．
| 2 |
| 7 |
| 1 |
| 9 |
| 1 |
| 9 |
| 3 |
| 7 |
=9
| 25 |
| 63 |
| 34 |
| 63 |
=
| 592 |
| 63 |
| 63 |
| 160 |
=
| 37 |
| 10 |
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