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25x37x4用简便方法汁算

(25x4)x37=100x37=3700

1.25x37x4 =(25x4)x37 =100x37 =3700 2.56x99+56 =56x99+56x1 =56x(99+1) =56x100 =5600 3.101x37 =(100+1)x37 =3700+37 =3737 4.35x15+35x10x6+35x25 =35x(15+60+25) =35x100 =3500 5.22x98+44 =22x98+22x2 =22x(98+2) =22x100 =2200 6.22x98+44 =22x98+22x2 =22x(98+2) =22x100 =2200

在乘法计算中,能简便计算的可以运用运算律来进行简便计算,这样既速度快,结果也准确.常用的是交换律,结合律,分配律等.此题可以观察出25*37得笔算,而25*4就可以口算,所以可以先用交换律,让37和4交换过来,再让25和4结合,也就是25*4=100,100*37=370025x37x4=25*4*37=100*37=3700 一般老师会让学生记住几个特殊的乘法:25*4=100,125*8=10000 这样在以后的计算中,就会熟练进行简便计算了.

25x37x4=25x4x37=100x37=3700

25x37x4=25x4x37=100x37=3700

解:25*45*4原式=25*4*45 =100*45 =4500.

25x37x(2x4)=25x4x2x37=200x37=7400

25x37x4=25*4*37=100*37=3700

解:25x26x4 =(25*4)*26 =100*26 =2600望采纳,谢谢!!

201x37x4x25=[(200+1)x37]x(4x25)=(7400+37)x100=7400x100+37x100=740000+3700=743700

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