| 文件 | 时间 | 大小 | 操作 | |
|---|---|---|---|---|
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1.1观察物体.mp4 | 2024-02-29 14:36:54 | 39.68 MB | |
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2.1因数和倍数（1）.mp4 | 2024-02-29 14:36:54 | 36.38 MB | |
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2.2因数和倍数（2）.mp4 | 2024-02-29 14:36:54 | 35.29 MB | |
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2.3_2.5的倍数特征.mp4 | 2024-02-29 14:36:54 | 35.55 MB | |
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2.4_3的倍数特征.mp4 | 2024-02-29 14:36:54 | 46.02 MB | |
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2.5_质数和合数.mp4 | 2024-02-29 14:36:54 | 60.23 MB | |
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2.6_奇偶性.mp4 | 2024-02-29 14:36:54 | 23.9 MB | |
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3.1长方体的认识.mp4 | 2024-02-29 14:36:54 | 46.97 MB | |
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3.2正方体的认识.mp4 | 2024-02-29 14:36:54 | 39.69 MB | |
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3.3长方体和正方体的表面积（1）.mp4 | 2024-02-29 14:36:54 | 48.35 MB | |
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3.4长方体和正方体的表面积（2）.mp4 | 2024-02-29 14:36:54 | 52.24 MB | |
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3.5体积和体积单位（1）.mp4 | 2024-02-29 14:36:54 | 29.3 MB | |
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3.6体积和体积单位（2）.mp4 | 2024-02-29 14:36:54 | 57.21 MB | |
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3.7体积单位间的进率.mp4 | 2024-02-29 14:36:54 | 63.38 MB | |
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3.8容积和容积单位.mp4 | 2024-02-29 14:36:54 | 34.44 MB | |
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3.9不规则物体的体积.mp4 | 2024-02-29 14:36:54 | 45.84 MB | |
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4.10最小公倍数（1）.mp4 | 2024-02-29 14:36:54 | 57.88 MB | |
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4.11最小公倍数（2）.mp4 | 2024-02-29 14:36:54 | 33.73 MB | |
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4.12通分(1).mp4 | 2024-02-29 14:36:54 | 47.61 MB | |
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4.13通分（2）.mp4 | 2024-02-29 14:36:54 | 55.75 MB | |
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4.14分数和小数的互化（1）.mp4 | 2024-02-29 14:36:54 | 24.75 MB | |
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4.15分数和小数的互化（2）.mp4 | 2024-02-29 14:36:54 | 49.71 MB | |
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4.1分数的产生和意义.mp4 | 2024-02-29 14:36:54 | 36.88 MB | |
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4.2分数与除法（1）.mp4 | 2024-02-29 14:36:54 | 37.83 MB | |
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4.3分数与除法（2）.mp4 | 2024-02-29 14:36:54 | 36.38 MB | |
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4.4真分数和假分数（1）.mp4 | 2024-02-29 14:36:54 | 48.56 MB | |
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4.5_真分数和假分数（2）.mp4 | 2024-02-29 14:36:54 | 42.71 MB | |
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4.6分数的基本性质.mp4 | 2024-02-29 14:36:54 | 52.54 MB | |
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4.7最大公因数（1）.mp4 | 2024-02-29 14:36:54 | 62.34 MB | |
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4.8最大公因数（2）.mp4 | 2024-02-29 14:36:54 | 50.03 MB | |
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4.9约分.mp4 | 2024-02-29 14:36:54 | 38.97 MB | |
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5.1旋转（1）.mp4 | 2024-02-29 14:36:54 | 47.75 MB | |
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5.2旋转（2）.mp4 | 2024-02-29 14:36:54 | 58.14 MB | |
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5.3平移和旋转的应用.mp4 | 2024-02-29 14:36:54 | 69.75 MB | |
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6.1同分母分数的加法.mp4 | 2024-02-29 14:36:54 | 18.86 MB | |
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6.2同分母分数的减法.mp4 | 2024-02-29 14:36:54 | 21.77 MB | |
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6.3异分母分数加法.mp4 | 2024-02-29 14:36:54 | 20.94 MB | |
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6.4_异分母分数减法.mp4 | 2024-02-29 14:36:54 | 25.34 MB | |
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6.5分数的加减混合运算.mp4 | 2024-02-29 14:36:54 | 30.66 MB | |
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6.6分数加减简便运算.mp4 | 2024-02-29 14:36:54 | 28.32 MB | |
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6.7解决问题.mp4 | 2024-02-29 14:36:54 | 25.59 MB | |
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6.8打电话.mp4 | 2024-02-29 14:36:54 | 24.74 MB | |
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7.1单式折线统计图.mp4 | 2024-02-29 14:36:54 | 29.57 MB | |
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7.2复式折线统计图.mp4 | 2024-02-29 14:36:54 | 25.15 MB | |
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8.1_找次品.mp4 | 2024-02-29 14:36:54 | 40.91 MB | |
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8.2_找次品.mp4 | 2024-02-29 14:36:54 | 75.12 MB |