题目内容
计算：[2
-(8.5-2
)÷3.5]×7
=______．
| 3 |
| 5 |
| 2 |
| 3 |
| 1 |
| 2 |
[2
-(8.5-2
)÷3.5]×7
=
=[
-（
-
）÷
]×
，
=[
-
×
]×
，
=[
-
]×
=
×
-
×
=
-
=7．
| 3 |
| 5 |
| 2 |
| 3 |
| 1 |
| 2 |
=[
| 13 |
| 5 |
| 17 |
| 2 |
| 8 |
| 3 |
| 7 |
| 2 |
| 15 |
| 2 |
=[
| 13 |
| 5 |
| 35 |
| 6 |
| 2 |
| 7 |
| 15 |
| 2 |
=[
| 13 |
| 5 |
| 5 |
| 3 |
| 15 |
| 2 |
=
| 13 |
| 5 |
| 15 |
| 2 |
| 5 |
| 3 |
| 15 |
| 2 |
=
| 39 |
| 2 |
| 25 |
| 2 |
=7．
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