二上数学《乘加、乘减》视频精讲

乘加、乘减 名师视频精讲1https://v.qq.com/txp/iframe/player.html?vid=u0508ht37v5&width=500&height=375&auto=0

乘加乘减式题 名师视频精讲https://v.qq.com/txp/iframe/player.html?vid=c031463bkb7&width=500&height=375&auto=0

乘加乘减 微课精讲https://v.qq.com/txp/iframe/player.html?vid=m0176tr5v8p&width=500&height=375&auto=0

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