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三年级数学下册，24时计时法精讲，动画演示，再做题目易如反掌
三年级数学下册新授课，通过演示让孩子认识24是计时法，并与普通计时法进行区别，学好了这一课就能玩转24时计时法
三年级数学下册10/12
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三年级数学下册新授课，通过演示让孩子认识24是计时法，并与普通计时法进行区别，学好了这一课就能玩转24时计时法
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