5.5×+4.5+52×0.55简便计算
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5.5×+4.5+52×0.55简便计算5.5×4.5+52×0.55=0.55×45+52×0.55=0.55×(45+52)=0.55×97=53.35
咨询记录 · 回答于2023-02-11
5.5×+4.5+52×0.55简便计算
5.5×+4.5+52×0.55简便计算5.5×4.5+52×0.55=0.55×45+52×0.55=0.55×(45+52)=0.55×97=53.35
把5.5×4.5,改写成0.55×45,这样就可以利用乘法分配律
最后面0.55×97,还可以继续简便0.55×97=0.55×(100-3)=0.55×100-0.55×3=55-1.65=53.35