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各种计算工具

各种计算工具. 算筹图片. 介绍算盘的各部分名称. 上面是两个珠子. 两种算盘. 上面是一个珠子. 介绍计算器的每个键的功能. 利用计算器计算 386+179 825-138 26×39 312÷8 63×7842 365×734 327180÷492. 用计算器计算 3849+29563 739×254 24010-18925 297756÷919 6389×74 1572×639 51000-29814 25488÷236. 找规律 9999×1=9999

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各种计算工具

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  1. 各种计算工具

  2. 算筹图片

  3. 介绍算盘的各部分名称

  4. 上面是两个珠子 两种算盘 上面是一个珠子

  5. 介绍计算器的每个键的功能

  6. 利用计算器计算 386+179 825-138 26×39 312÷8 63×7842 365×734 327180÷492 用计算器计算 3849+29563 739×254 24010-18925 297756÷919 6389×74 1572×639 51000-29814 25488÷236

  7. 找规律 9999×1=9999 9999×2=19998 9999×3=29997 9999×4=39996 9999×5=49995 9999×6=59994 9999×7=69993 9999×8=79992 9999×9=89991

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