25x2用简便方法计算

25的平方等于2*300+5*5=625

原式=25x(4x13)=(25x4)x13=100x13=1300 供参考.

5x4x25x2=5x2x4x25 (乘法交换律)=(5x2)x(4x25) (乘法结合律)=10x100=1000.

简便方法计算3.7x1.25+1.25x2.3=(3.7+2.3)*1.25=6*1.25=7.5

25*21=25*3*7=75*7=525你好,本题已解答,如果满意,请点右上角“采纳答案”.

原式=25x16x4=25x4x16=100x16=1600

125x32x25=(1.25*8)*(0.4*2.5)=10*1=10

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

125*82一|25x2简便方法记算=125*(82-2)=125*80=10000

25x24x6x2=25x(4x6)x6x2=25x4x6x6x2=(25x4)x6x6x2=100x(6x6x2)=100x(36x2)=100x72=7200

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