小数乘法简便计算精选一线教师 倾情奉献 17Word格式文档下载.docx

小数乘法简便计算精选一线教师 倾情奉献 17Word格式文档下载.docx

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2500.31×

98

3.99×

2001.4×

103

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3.75×

405.9×

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1.55×

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102

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3.85×

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