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免费下载小学六年级奥数教研课《举一反三比较数的大小》ppt课件

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免费下载小学六年级奥数教研课《举一反三比较数的大小》ppt课件
比较数的大小
六年级奥数
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例题一
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例题二
什么时候用?
如果要比较的分数都接近1时,可先用1减去原分数,再根据被减数相等(都是1),减数越小,差越大的道理判断原分数的大小。 

常见的基准数: 1,
差数法
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例题三
倒数法
什么时候用?
如果两个数的倒数接近,可以先用1分别除以这两个数。再根据被除数相等,商越小,除数越大的道理判断原数的大小。
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例题四
( )。
解析:
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例题五
解析:
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