| 文件 | 时间 | 大小 | 操作 | |
|---|---|---|---|---|
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1.1_数据收集整理（1）.mp4 | 2024-02-29 14:36:54 | 20.8 MB | |
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1.2_数据收集整理（2）.mp4 | 2024-02-29 14:36:54 | 21.28 MB | |
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2.1_平均分（1）.mp4 | 2024-02-29 14:36:54 | 18.18 MB | |
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2.2_平均分（2）.mp4 | 2024-02-29 14:36:54 | 22.58 MB | |
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2.3_除法（1）.mp4 | 2024-02-29 14:36:54 | 18.04 MB | |
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2.4_除法（2）.mp4 | 2024-02-29 14:36:54 | 22.9 MB | |
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2.5_用2-6的乘法口诀求商.mp4 | 2024-02-29 14:36:54 | 21.88 MB | |
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2.6_解决问题.mp4 | 2024-02-29 14:36:54 | 20.68 MB | |
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3.1_轴对称图形的认识.mp4 | 2024-02-29 14:36:54 | 37.59 MB | |
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3.2_平移.mp4 | 2024-02-29 14:36:54 | 38.67 MB | |
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3.3_旋转.mp4 | 2024-02-29 14:36:54 | 29.46 MB | |
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3.4_剪纸.mp4 | 2024-02-29 14:36:54 | 39.28 MB | |
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4.1_用7、8的乘法口诀求商.mp4 | 2024-02-29 14:36:54 | 39.1 MB | |
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4.2_用9的乘法口诀求商.mp4 | 2024-02-29 14:36:54 | 47.37 MB | |
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4.3_解决问题.mp4 | 2024-02-29 14:36:54 | 29.48 MB | |
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5.1_加减或乘除同级运算.mp4 | 2024-02-29 14:36:54 | 37.45 MB | |
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5.2_加减乘除混合运算.mp4 | 2024-02-29 14:36:54 | 51.55 MB | |
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5.3_有括号的混合运算.mp4 | 2024-02-29 14:36:54 | 42.69 MB | |
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5.4_解决问题.mp4 | 2024-02-29 14:36:54 | 48.64 MB | |
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6.1_有余数的除法（1）.mp4 | 2024-02-29 14:36:54 | 26.82 MB | |
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6.2_有余数的除法（2）.mp4 | 2024-02-29 14:36:54 | 43.34 MB | |
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6.3_解决问题.mp4 | 2024-02-29 14:36:54 | 61.03 MB | |
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7.1_1000以内数的认识.mp4 | 2024-02-29 14:36:54 | 23.74 MB | |
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7.2_千以内数的读写和组成.mp4 | 2024-02-29 14:36:54 | 30.62 MB | |
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7.3_用算盘计数.mp4 | 2024-02-29 14:36:54 | 37.59 MB | |
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7.4_10000以内数的认识.mp4 | 2024-02-29 14:36:54 | 45.19 MB | |
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7.5_万内数的读法和写法.mp4 | 2024-02-29 14:36:54 | 39.95 MB | |
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7.6_万以内数的大小比较.mp4 | 2024-02-29 14:36:54 | 31.77 MB | |
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7.7_近似数.mp4 | 2024-02-29 14:36:54 | 19.51 MB | |
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7.8_整百、整千数加减法.mp4 | 2024-02-29 14:36:54 | 15.45 MB | |
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8.1_克和千克.mp4 | 2024-02-29 14:36:54 | 23.61 MB | |
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8.2_解决实际问题.mp4 | 2024-02-29 14:36:54 | 24.35 MB | |
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9.1_推理（1）.mp4 | 2024-02-29 14:36:54 | 16.58 MB | |
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9.2_推理（2）.mp4 | 2024-02-29 14:36:54 | 39.12 MB |