125*(7*4)*9 = = = = = = = (简便计算)125*(7*4)*9= (简便计算)

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125*(7*4)*9=======(简便计算)125*(7*4)*9=(简便计算)125*(7*4)*9=======(简便计算)125*(7*4)*9=(简便计算)125*(7*4)*9=====

125*(7*4)*9 = = = = = = = (简便计算)125*(7*4)*9= (简便计算)
125*(7*4)*9 = = = = = = = (简便计算)
125*(7*4)*9= (简便计算)

125*(7*4)*9 = = = = = = = (简便计算)125*(7*4)*9= (简便计算)
125*(7*4)*9
=(125*4)*(7*9)
=500*63
=31500

125*8=1000,125*4就是它的一半,也就是500,同理125*16就等于2000,以此类推。
还有一个是关于25的,25*4=100,所以25*8就等于200。25*12=300,等等。这就是规律!

125*(7*4)*9
=125*4*7*9
=500*7*9
=3500*9
=31500
请采纳!

125*(7*4)*9 = = = = = = = (简便计算)125*(7*4)*9= (简便计算) 下面运用了那些乘法运算定律125*9*8=9*(125*8) 7*4*5*9=(7*9)*(4*5) 例.1.8*73+52*8 例.2.9*96+3*9+9=8*(73+52) =9*(96+3+1)=8*125 =9*100+1000 =9001.54*99+99*45 4.54+99*99+45= == == =2.100*89+89*11+89*89 5.100*89-89*11-89*89= == == =3.8*999*8 6.5*999+5+99*7+7+4*9+4= == == = (125-9)*8的简便算法(125-9)*8=(125*9)-(125*8)=1125-1000=125 求教!要式子.201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 1 2=8 3=27 4=64 5=125 9=? (x+4)³=-125 1=5 2=25 3=125 4=625 5=?6=?7=?8=?... 48000/125=()*()/125=()/5=() 求下列各式中的x值(1)4x²-9=0(2)5x²=125(3)2(1-x)²=8(4)7x²+3=346 9分之7*1025+3分之1*125%-5/4=?用简便计算 ()*11/4=0.9+()=()/7/5=1.25-()还有一道题()*4/7=9*()=()*7分之5=0.5*()=1 ():125=8分之9:8分之1 ():8=()分之24=4分之3=()%=()填小数 125×56=125×7×125×8对吗? 2/9:7/9=3/4:(4-x) (7/9-5/6+3/4-11/8)×(-36) = = = = 1.怎样简便就怎样算:42×125 473+79-63 5×999+5+99×7+7+3×9+3+9 = = = = = = = = =42×125 473+79-63 5×999+5+99×7+7+3×9+3+9= = == = == = = 1、7(2x+1)=492、(x+8)÷8=63、4(x+3)=32×34、3(x+5)-42=125、(10x-90+2x)÷2=756、(7x-3x+59)÷3=297、9x-8=x8、12x+12=16x9、144÷x+6=1210、125÷-5=5必须要解出来 例如:=什么什么