巧算(224488+224.488)÷(112244+112.244)

aarhusyu2022-10-04 11:39:541条回答

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liuming252161 共回答了16个问题 | 采纳率81.3%
两个括号中同时除以112244,得到
(2+0.002)÷(1+0.001)=2.002÷1.001=2
1年前

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(224488-224.488)(112244+112.244)简便计算
陈子俊1年前1
风卷云飞 共回答了12个问题 | 采纳率91.7%
第一种算法:
(224488-224.488)×(112244+112.244)
=[112244×2(1-0.001)] ×[112244×(1+0.001)]
=(112244×112244)×2×[(1-0.001)×(1+0.001)]
=(112244×112244)×2×0.999999
=112244² ×2×0.999999
=12598715536×1.999998
=25197405874.569
第二种算法:
(224488-224.488)×(112244+112.244)
=[224488×(1-0.001)]×[224488×0.5×(1+0.001)]
=(224488×224488) ×0.5×[(1-0.001)×(1+0.001)]
=(224488×224488) ×0.5×0.999999
=224488² ×0.5×0.999999
=50394862144×0.4999995
=25197405874.569
(224488+224.488)÷(112244+112.244)简便计算
shasandy1年前1
laoniu1863 共回答了19个问题 | 采纳率100%
(224488+224.488)÷(112244+112.244)
=224.488(1000+1)÷112.244(1000+1)
=224.488÷112.244
=2