来自韩光的问题
【用简便方法计算(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=】
用简便方法计算
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=
2回答
2020-09-2615:28
【用简便方法计算(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=】
用简便方法计算
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=
728x99=728*(100-1)=72800-728=72072
562x101-562=562*(101-1)=56200
810÷45=90*9/45=45*18/45=18
63x37+37x37=37*(63+37)=3700
4.82-1.75+2.18-3.25=(4.82+2.18)-(1.75+3.25)=7-5=2
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)=