题目内容
计算
（1）[5-3
÷（1
+2.25×
）]÷12.50%
（2）[2-（8.25-5
）×
]÷0.9．
（1）[5-3
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
（2）[2-（8.25-5
| 1 |
| 3 |
| 2 |
| 3 |
（1）[5-3
÷（1
+2.25×
）]÷12.50%，
=[5-3
÷（
+
）]×8，
=[5-
×
]×8，
=3.5×8，
=28；
（2）[2-（8.25-5
）×
]÷0.9，
=[2-（8.25-5
）×
]÷0.9
=[2-（
-
）×
]÷0.9，
=[2-
×
]×
，
=
×
，
=
．
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
=[5-3
| 7 |
| 8 |
| 11 |
| 6 |
| 3 |
| 4 |
=[5-
| 31 |
| 8 |
| 12 |
| 31 |
=3.5×8，
=28；
（2）[2-（8.25-5
| 1 |
| 3 |
| 2 |
| 3 |
=[2-（8.25-5
| 1 |
| 3 |
| 2 |
| 3 |
=[2-（
| 99 |
| 12 |
| 64 |
| 12 |
| 2 |
| 3 |
=[2-
| 35 |
| 12 |
| 2 |
| 3 |
| 10 |
| 9 |
=
| 1 |
| 18 |
| 10 |
| 9 |
=
| 5 |
| 81 |
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