0.57X80.6+1.94X5.70.25X12.5X3.2简便j计数

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0.57X80.6+1.94X5.70.25X12.5X3.2简便j计数0.57X80.6+1.94X5.70.25X12.5X3.2简便j计数0.57X80.6+1.94X5.70.25X12.5X

0.57X80.6+1.94X5.70.25X12.5X3.2简便j计数
0.57X80.6+1.94X5.7
0.25X12.5X3.2
简便j计数

0.57X80.6+1.94X5.70.25X12.5X3.2简便j计数
1.原式=5.7X8.06+1.94X5.7=5.7*(8.06+1.94)=5.7*10=57
2.原式=0.25*12.5*0.4*8
=0.25*0.4*12.5*8
=0.1*100=10

第一题不会诶
0.25*12.5*3.2
=0.25*12.5*(0.4*8)
=0.25*0.4*8*12.5
=0.1*10
=1

=5.7*8.06+1.94*5.7
=5.7*(8.06+1.94)
=5.7*10
=57
注:*为乘号

你好!

1.原式=5.7X8.06+1.94X5.7=5.7*(8.06+1.94)=5.7*10=57
2.原式=0.25*12.5*0.4*8
=0.25*0.4*12.5*8
=0.1*100=10
希望我的回答对您有所帮助!

原式=5.7X8.06+1.94X5.7=5.7*(8.06+1.94)=5.7*10=57
原式=0.25*12.5*0.4*8
=0.25*0.4*12.5*8
=0.1*100=10

只要把0.57扩大十倍,和5.7一样。80.6再缩小十倍,利用乘法分配率就可以简便计算:
=5.7乘8.06+1.94乘5.7
=5.7乘(8.06+1.94)
下面我就不说了,肯定会。
这一道可以把3.2拆成4和0.8,所以会想到把它们拼成整十数:0.25和4,12.5和0.8,题:(记着加小括号)
=(0.25乘4)乘(12.5乘0.8)
=1乘...

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只要把0.57扩大十倍,和5.7一样。80.6再缩小十倍,利用乘法分配率就可以简便计算:
=5.7乘8.06+1.94乘5.7
=5.7乘(8.06+1.94)
下面我就不说了,肯定会。
这一道可以把3.2拆成4和0.8,所以会想到把它们拼成整十数:0.25和4,12.5和0.8,题:(记着加小括号)
=(0.25乘4)乘(12.5乘0.8)
=1乘10
……
会了吧?

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