如题所述
第1个回答 2012-04-07
=125*8*25+125*40*25
=(125*8)*25+125*(40*25)
=1000*25+125*1000
=1000*(25+125)
=1000*150
=150000
=(125*8)*25+125*(40*25)
=1000*25+125*1000
=1000*(25+125)
=1000*150
=150000
第2个回答 2012-04-07
125*(8+40)*25
=125x8x25+125x40x25
=1000x25+125x100
=25000+12500
=37500
=125x8x25+125x40x25
=1000x25+125x100
=25000+12500
=37500
第3个回答 2012-04-07
125*(8+40)*25
=125*8*25+125*40*25
=25000+125000
=150000
=125*8*25+125*40*25
=25000+125000
=150000
第4个回答 2012-04-07
125*(8+40)*25
=(125x8+125x40)x25
=(1000+500)x25
=1000x25+500x25
=25000+12500
=37500追问
=(125x8+125x40)x25
=(1000+500)x25
=1000x25+500x25
=25000+12500
=37500追问
好像算错了哦。
追答125*(8+40)*25
=(125x8+125x40)x25
=(1000+5000)x25
=1000x25+5000x25
=25000+125000
=150000
现在好了
第5个回答 2012-04-07
125*(8+40)*25
=125*8*(1+5)*25
=1000*6*25
=1000*3*50
=150000追问
=125*8*(1+5)*25
=1000*6*25
=1000*3*50
=150000追问
为什么(1+5)
追答(8+40) = (8*1+8*5) = 8*(1+5)
追问谢谢你!再问:87*470+870*53怎么简便?
追答87*470+870*53
=870*47+870*53
=870*(47+53)
=870*100
=87000