题目内容
[（0.8-
）÷13
+3.76]×1
．
| 4 |
| 15 |
| 1 |
| 3 |
| 2 |
| 19 |
[（0.8-
）÷13
+3.76]×1
=[（
-
）×
+3.76]×
，
=[
×
+3.76]×
，
=[0.04+3.76]×
，
=3.8×
，
=4.2．
| 4 |
| 15 |
| 1 |
| 3 |
| 2 |
| 19 |
=[（
| 4 |
| 5 |
| 4 |
| 15 |
| 3 |
| 40 |
| 21 |
| 19 |
=[
| 8 |
| 15 |
| 3 |
| 40 |
| 21 |
| 19 |
=[0.04+3.76]×
| 21 |
| 19 |
=3.8×
| 21 |
| 19 |
=4.2．
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