用简便方法计算下面各题．25+914+514=14+37+34+47=1120+49+920-49=67-(47+114)=1118-58+1718-38=6-27-57=916-(34-316)=27+(35+17)-15=-数学
| 5 |
| 14 |
=
| 2 |
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| 9 |
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| 5 |
| 14 |
=
| 2 |
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=1
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（2）
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| 3 |
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| 4 |
| 7 |
=（
| 1 |
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| 3 |
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| 3 |
| 7 |
| 4 |
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=1+1，
=2；
（3）
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| 9 |
| 9 |
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| 9 |
=（
| 11 |
| 20 |
| 9 |
| 20 |
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| 9 |
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=1+0，
=1；
（4）
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| 1 |
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=
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| 1 |
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=
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=
