作业帮369-(342-61)简便运算
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/17 02:12:23
（342÷9+54）×21=(38+54)×21=92×21=92×(20+1)=92×20+92=1840+92=1932
=369-369×0.01+369×0.01=369
369×886+342×123=369×886+342/3×369=369×886+114×369=369×(886+114)=369×1000=369000
3.69*9+369=3.69*（10-1）+369=369-3.69+369=734.31我没事随便回答
1+（-2）=-13+(-4)=-1...99+(-100)=-1那么就有50个-1相加就等于-50
369*0.99+3.69=369*0.99+369*0.01=369*（0.99+0.01）=369
(360+9)*(250+6)=360*250+9*250+360*6+9*6=90000+2250+2160+54=94410+54=94464
410-39+61=410—40＋1＋60＋1=410＋60—40＋1＋1=430＋2=432
因为3.69=369×0.01所以原始等于369×0.99+369×0.01=369×1
61*38+61*60+61*2=61*(38+60+2)=61*100=6100
39-39+（61+61）=122再问：简便计算128*64-128*48+128*50-16*128再答：ԭʽ=128*��64-48+50-16��=128*��64-16+2��=128*��6
(39+61)+(75+25)=100+100=200
解题思路：化简小括号后，变为依次大1/2的等差数列。问题可求。解题过程：varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prced
58+39+42+61=(58+42)+(39+61)=100+100=200
369+498=369+500-2=869-2=867
62分之61乘63=61/62*（62+1）=61/62*62+61/62=61+61/62=61又61/62
213*12.5*61*8=213*63*(12.5*8)=13419*100=1341900
63*(61+1)/61=(63*61+63)/61=(63*61+61+2)/61=64+2/61
61+5×610+49×61=61x(1+50+49)=61x100=6100