计算①920÷[12×（25+45）]②（0.4+23）÷（56-0.75）×0.5③1.25+114×7.4+125%÷58④393939×899899377377×939393⑤6.6-135÷（0.375×45+18×0.8）⑥514-2.125+（4.75-338）⑦1124+[（1.5-数学
=1
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| 24 |
| 25 |
| 6 |
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| 8 |
| 9 |
=1
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| 24 |
| 10 |
| 9 |
| 2 |
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| 8 |
| 9 |
=1
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| 24 |
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| 8 |
| 9 |
=1
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| 24 |
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=1
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| 24 |
⑧
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| 1×4 |
| 1 |
| 4×7 |
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| 7×10 |
| 1 |
| 97×100 |
=
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| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 10 |
| 1 |
| 97 |
| 1 |
| 100 |
=
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| 3 |
| 1 |
| 100 |
=
| 1 |
| 3 |
| 99 |
| 100 |
=
