内容正文:
第三单元
生活中的数
义务教育北师大版一年级下册
第 1 课时
数花生
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麻屋子,
红帐子,
里面住着个白胖子。
情境导入
花 生
猜一猜
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探究新知
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淘气和笑笑各有多少个花生?一个一个地数一数。
二十九后面是三十。
……二十七、二十八、二十九,后面是……
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九十九后面是一百。
……九十七、九十八、九十九,后面是……
淘气和笑笑各有多少个花生?一个一个地数一数。
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数得对吗?
我一个一个地数,再数一次。
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我两个两个地数,再数一次。
数得对吗?
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换一种方法数一数。
五个五个地数。
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十个十个地数。
换一种方法数一数。
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用不同的方法数出三十个 和二十个 ,圈出来。
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100以内数的数法:
①一个一个地数
②两个两个地数
③五个五