题目内容
[（1
×2+2.5）÷
-2
]÷16．
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 5 |
[（1
×2+2.5）÷
-2
]÷16，
=[（
+
）÷
-2
]÷16，
=[
×
-2
]÷16，
=[
-2
]÷16，
=
×
，
=
．
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 5 |
=[（
| 10 |
| 3 |
| 5 |
| 2 |
| 7 |
| 8 |
| 1 |
| 5 |
=[
| 35 |
| 6 |
| 8 |
| 7 |
| 1 |
| 5 |
=[
| 20 |
| 3 |
| 1 |
| 5 |
=
| 67 |
| 15 |
| 1 |
| 16 |
=
| 67 |
| 240 |
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