怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理好吗谢谢=(12×__)÷(1.25×__)=()×()=()94÷0.25÷4=94÷(__×__)=94÷()=()=(12×8__)÷(1.25×8__)=(96)÷(10)=(9.6
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![怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理好吗谢谢=(12×__)÷(1.25×__)=()×()=()94÷0.25÷4=94÷(__×__)=94÷()=()=(12×8__)÷(1.25×8__)=(96)÷(10)=(9.6](/uploads/image/z/3879811-19-1.jpg?t=%E6%80%8E%E6%A0%B7%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E8%AE%A1%E7%AE%97%E4%B8%8B%E5%88%97%E5%90%84%E9%A2%98%EF%BC%9A12%C3%B71.25%E3%80%8194%C3%B70.25%C3%B70.4%2C%E8%AF%B7%E8%AF%B4%E6%98%8E%E5%9F%BA%E6%9C%AC%E5%8E%9F%E7%90%86%E5%A5%BD%E5%90%97%E8%B0%A2%E8%B0%A2%3D%EF%BC%8812%C3%97__%EF%BC%89%C3%B7%281.25%C3%97__%EF%BC%89%3D%EF%BC%88%EF%BC%89%C3%97%EF%BC%88%EF%BC%89%3D%EF%BC%88%EF%BC%8994%C3%B70.25%C3%B74%3D94%C3%B7%EF%BC%88__%C3%97__%EF%BC%89%3D94%C3%B7%EF%BC%88%EF%BC%89%3D%EF%BC%88%EF%BC%89%3D%EF%BC%8812%C3%978__%EF%BC%89%C3%B7%281.25%C3%978__%EF%BC%89%3D%EF%BC%8896%EF%BC%89%C3%B7%EF%BC%8810%EF%BC%89%3D%EF%BC%889.6)
怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理好吗谢谢=(12×__)÷(1.25×__)=()×()=()94÷0.25÷4=94÷(__×__)=94÷()=()=(12×8__)÷(1.25×8__)=(96)÷(10)=(9.6
怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理好吗谢谢
=(12×__)÷(1.25×__)
=()×()
=()
94÷0.25÷4
=94÷(__×__)
=94÷()
=()
=(12×8__)÷(1.25×8__)
=(96)÷(10)
=(9.6)
94÷0.25÷4
=94÷(_0.25_×_4_)
=94÷(1)
=(94)
为什么这样做,请说明道理,
怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理好吗谢谢=(12×__)÷(1.25×__)=()×()=()94÷0.25÷4=94÷(__×__)=94÷()=()=(12×8__)÷(1.25×8__)=(96)÷(10)=(9.6
=(12×8__)÷(1.25×8__)
=(96)÷(10)
=(9.6)
94÷0.25÷4
=94÷(_0.25_×_4_)
=94÷(1)
=(94)
主要是利用乘法原理及0.25*4=1,1.25*8=10 的特殊值.
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94除以0.25除以0.4 94除以 0.25乘0.4 94除以0.1 9.4