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23x134一34x23简便算法

23x134-34x23=23x(134-34)=23x100=2300 答题不易,求采纳!!!

23X(134-34)=2300

23X134-34-23 =23X100+(23-1)X(34-1)-1=2300+2X3X11X11-1=2300+6X121-1=2300+726-1 =3025

23x124一22x23一46=23x124一22x23一2x23=(124-22-2)x23=100x23=2300

34x134一34x34用简便方法怎么做=34*(134-34)=34*100=3400

23x101一23=23x(101一1)=23x100=2300

=24x(134-34)=24x100=2400

42x23一23x7=(42一7)x23=35x23=805

23134-3423=23(134-34)=23100=2300

23x85-23x16-23=23x(85-16-1)=23x68=23*(70-2)=23*70-23*2=1610-46=1564

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