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125x 31x8 简便运算

=125x8x36=1000x36=36000

31x125x3x8=31*3*125*8=93*1000=93000

原式=125*8*40 =1000*40 =40000

8x(31x125)=(8x125)x31=1000x31=31000

125*(15*8)=125*8*15=1000*15=15000 回答完毕~ 有疑问请追问,我一定尽快回复你~ 无疑问请点击【采纳】,同时预祝学习进步~\(^o^)/~ 我不是学霸,叫我赌神~\(^o^)/~~\(^o^)/~~\(^o^)/~~\(^o^)/~

125x(32+8)=125*8*5=1000*5=5000 供参考,有疑问请追问

原式=125x43=125x(40+3)=125x40+125x3=125x8x5+375=1000x5+375=5000+375=5375

125x21x8的简便计算;125x21x8=125*8*21=1000*21=21000

125x(47x8)=125x8x47=1000x47=47000

125x(35+8)=125x43=125x(40+3)=125x40+125x3=5000+375=5375

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