计算题：（1）[（23-14）÷56+45]×511（2）（38+56-712）×24（3）920÷[12×（25+45）]（4）23+（12+23）×27．-数学
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| 5 |
| 11 |
=[
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=
| 13 |
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| 5 |
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=
| 13 |
| 22 |
（2）（
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=（
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| 7 |
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=
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=15；
（3）
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| 2 |
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=
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=
| 9 |
| 20 |
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=0.75；
（4）
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| 22 |
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| 12 |
| 29 |
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| 15 |
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| 9 |
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| 2 |
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| 9 |
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| 9 |
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