题目内容
怎样简便就怎样计算．
57.5-4.25-15.75 125×32
×16.31-2.31÷
．
57.5-4.25-15.75 125×32
| 5 |
| 7 |
| 7 |
| 5 |
①57.5-4.25-15.75
=57.5-（4.25+15.75）
=57.5-20
=37.5；
②125×32
=125×8×4
=1000×4
=4000；
③
×16.31-2.31÷
=
×16.31-2.31×
=
×（16.31-2.31）
=
×14
=10．
=57.5-（4.25+15.75）
=57.5-20
=37.5；
②125×32
=125×8×4
=1000×4
=4000；
③
| 5 |
| 7 |
| 7 |
| 5 |
=
| 5 |
| 7 |
| 5 |
| 7 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
=10．
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