小数乘法简便计算精选一线教师 倾情奉献 53Word格式文档下载.docx
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小数乘法简便计算精选一线教师 倾情奉献 53Word格式文档下载.docx
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250.32×
102
6.48×
22.4×
1004
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0.69
6.57×
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101
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8099×
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99
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