速算课堂 | Joy 指心算(2)｜ 一位数的直加直减 Finger Abacus Simple Addition & Subtraction Within 9

速算课堂 | Joy 指心算(2)｜ 一位数的直加直减
Mental Math Tutorials| Learning Finger Abacus | Joy Finger Math (2) | Direct and Simple Addition and Subtraction Within 9
2/3/4/5 目指算 | 2/3/4/5 numbers add and sub using finger calculator


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Joy 指算法速算课堂 是Joy 的指心算视频教学播放列表 https://bit.ly/3gEh2jO
Joy Finger Maths classes are Joy ’s finger mental arithmetic video teaching playlists: ： https://bit.ly/3di1Kit

Joy 珠心算速算课堂 是Joy 的指心算视频教学播放列表 https://bit.ly/2Xj4PsY
Joy Abacus classes are Joy ’s abacus mental arithmetic video teaching playlists: ： https://bit.ly/3ck2AtY



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