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[高清新版] 小学奥数二年级下学期第01讲 速算与巧算例2
数学奥数，国语，二年级,加减法巧算例2![[高清新版] 小学奥数二年级上学期第01讲 速算与巧算 2](https://i.ytimg.com/vi/1V6uitHHHaU/hq720.jpg?sqp=-oaymwEjCOgCEMoBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAwxqvntwEPeSstCdHdTFimzmc52Q)
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[高清新版] 小学奥数二年级下学期第01讲 速算与巧算例1
二年级（上）- 巧算加减法（2）![[高清新版] 小学奥数二年级上学期第01讲 速算与巧算 4](https://i.ytimg.com/vi/0a1Ai2ZNWa0/hq720.jpg?sqp=-oaymwEjCOgCEMoBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLARX6VuYQY-vZXVE1ApDsBK7J6zYw)
[高清新版] 小学奥数二年级上学期第01讲 速算与巧算 4![[高清新版] 小学奥数二年级下学期第01讲 速算与巧算例4](https://i.ytimg.com/vi/dyBBAzHAadU/hq720.jpg?sqp=-oaymwEjCOgCEMoBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAgsjoaYlpL9_d-jmYlBurMPpNqRw)
[高清新版] 小学奥数二年级下学期第01讲 速算与巧算例4
数学奥数，国语，二年级,加减法巧算例1