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用简便方法计算101x27'x25x4

101x27-27x25x4=101x27-27x100=27x(101-100)=27x1=27,

=101*(25*4)=101*100=10100

=11X(25X4)=11X100=1100

101*25=(100+1)*25=100*25+1*25=2500+25=2525

用简便方法计算125X25X4125X25X4=125*(25*4)=125*100=12500

6x25x25x4=3x2x25x(25x4)=3x(2x25)x(25x4)=3x50x100=15000 希望帮到你 望采纳 谢谢 加油

利用乘法结合律,先把25x4结合在一起计算,再乘138最简便.计算步骤:138x25x4=138x(25x4)=138x100=13800

=(125*4)*(25*4) =500*100 =50000

(25*4)*68=100*68=6800

(30x25)x2x4=(30x2)x(25x4)=60x100=6000

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