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35 8 15的简便计算

35*15*8 =7*5*8*5*3 =25*8*21 =200*21 =4200

35*8*15=35*2*4*15=70*60=4200.谢谢.

35x8x15=(35x2)x(15x4)=70x60=4200

8先乘以5,再用35乘以得数.

35*(8*15)=35*120=35*(100+20)=4200

35815=35x(8x15)=35x120=4200

35*8*15=5*7*8*3*5=25*8*21=200*21=4200

30x(80+15)=30*(100-5)=3000-150=2850

35x8x15=5x7x2x4x3x5 =(5x5x4)x(7x2x3) =100x42 =4200

3515x8=35*15*2*4=35*2*(15*4)=70*60=4200

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