4.5×0.75-0.462×6.5简便运算？
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4.5×0.75-0.462×6.5简便运算:
4.5×0.75-0.462×6.5=4.5*0.75-4.62*0.65=4.5*0.75-4.5*0.65-0.12*0.65=4.5*（0.75-0.65）-0.12*0.65=0.45-0.12*0.65=0.45-0.1*0.65-0.02*0.65=0.45-0.065-0.0013=0.3837
4.5×0.75-0.462×6.5=4.5*0.75-4.62*0.65=4.5*0.75-4.5*0.65-0.12*0.65=4.5*（0.75-0.65）-0.12*0.65=0.45-0.12*0.65=0.45-0.1*0.65-0.02*0.65=0.45-0.065-0.0013=0.3837
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4.5×0.75-0.462×6.5
=4.5×0.75-0.462×4.5-0.462×2
=4.5×(0.75-0.462)-0.5×2+0.038×2
=4.5×0.288-1+0.076
=1.296-1+0.076
=2.296+0.076
=2.372
=4.5×0.75-0.462×4.5-0.462×2
=4.5×(0.75-0.462)-0.5×2+0.038×2
=4.5×0.288-1+0.076
=1.296-1+0.076
=2.296+0.076
=2.372
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