如题所述
9.9x0.45
=ï¼10-0.1ï¼x0.45
=10x0.45-0.1x0.45
=4.5-0.045
=4.455
=ï¼10-0.1ï¼x0.45
=10x0.45-0.1x0.45
=4.5-0.045
=4.455
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第1个回答 2016-09-23
9.9*0.45
=(10-0.1)*0.45
=10*0.45-0.1*0.45
=4.5-0.045
=4.455本回答被网友采纳
=(10-0.1)*0.45
=10*0.45-0.1*0.45
=4.5-0.045
=4.455本回答被网友采纳
第2个回答 2016-09-23
9.9×0.45
=(10-0.1)×0.45
=10×0.45-0.1×0.45
=4.5-0.045
=4.455
=(10-0.1)×0.45
=10×0.45-0.1×0.45
=4.5-0.045
=4.455