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科目:小学数学 来源: 题型:
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科目:小学数学 来源: 题型:
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科目:小学数学 来源: 题型:
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| 567+345×566 |
| 567×345+222 |
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科目:小学数学 来源: 题型:
| 左盘 | 物1克 | 物2克 | 物3克 | 物4克 |
| 1克砝码 | ||||
| 右盘 | 1克砝码 | 3克砝码 | 3克砝码 | 1克、3克砝码 |
| 计算物体的质量(克) | 1=1 | 2=3-1 | 3=3 | 4=3+1 |
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