小数乘法简便计算精选一线教师 倾情奉献 8Word下载.docx
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2.50.71×
999
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6.59×
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1001
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6.81×
404.6×
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4.7×
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0.71
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98
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102
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0.82×
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0.89
9.64×
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99
7.66×
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0.66
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