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50 2x80x5的简便算法

6x32x5的简便计算=6x5x32=30x32=960

49x2x5 =49x(2x5) =49x10 =490 笑望采纳,谢谢!

32x6x5 =32x(6x5) =32x30 =960

12x6x5=12x(6x5)=12x30=360

(30425)5简便计算304*25÷5=304*5=1520 直接计算

15.5+51x0.5=15.5+(50+1)x0.5=15.5+25+0.5=15.5+0.5+25=16+25=41

125x16x5=125x(8x2)x5=(125x8)x(2x5)=1000x10=10000

1.25x8.8x5=1.25*8*1.1*5=10*5.5=55如果对您有帮助;请采纳答案,谢谢.

(50一5)x40解:简便计算=50x40-5x40=2000-200=1800祝学习进步

=2.12*(0.8*5)=2.12*4=8.48

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