摘要:25-3.42-1.58 8.27+3.7+0.73+6.3 25×23×4 28 ×38+72×38
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| 8.5×〔(2.36+2.42)÷0.25〕 | 3.9÷(1.3+0.6)×6 | 205×99 |
| 4.25×6.3+3.7×4.25 | 25.6-7.49-2.51 | 〔2.5-(6.8-4.9)〕×0.8. |