题目内容
脱式计算．
×8+
÷4
×.
÷
×
?
×
÷
（455-12.5×4）÷8.1．
| 5 |
| 6 |
| 4 |
| 5 |
| 3 |
| 8 |
| 4 |
| 5 |
| 3 |
| 8 |
| 4 |
| 5 |
| 2 |
| 13 |
| 5 |
| 8 |
| 15 |
| 26 |
（455-12.5×4）÷8.1．
（1）
| 5 |
| 6 |
| 4 |
| 5 |
=
| 20 |
| 3 |
| 1 |
| 5 |
=
| 103 |
| 15 |
（2）
| 3 |
| 8 |
| 4 |
| 5 |
| 3 |
| 8 |
| 4 |
| 5 |
=
| 3 |
| 10 |
| 3 |
| 8 |
| 4 |
| 5 |
=
| 4 |
| 5 |
| 4 |
| 5 |
=
| 16 |
| 25 |
（3）
| 2 |
| 13 |
| 5 |
| 8 |
| 15 |
| 26 |
=
| 5 |
| 52 |
| 15 |
| 26 |
=
| 1 |
| 6 |
（4）（455-12.5×4）÷8.1，
=（455-50）÷8.1，
=405÷8.1，
=50．
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