1/2+5/6+11/12+19/20+.+9899/9900详解
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1/2+5/6+11/12+19/20+.+9899/9900详解
1/2+5/6+11/12+19/20+.+9899/9900详解
1/2+5/6+11/12+19/20+.+9899/9900详解
原式=1-1/2+1-1/6+1-1/12+1-1/20+…………+1-1/9900
=99-﹙1/2+1/6+1/12+1/20+……+1/9900﹚
=99-﹙1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+……+1/99-1/100﹚
=99-﹙1-1/100﹚
=99-1+1/100
=98+1/100
=98又1/100.
1/2+5/6+11/12+19/20+....+9899/9900
=1-(1/2)+1-(1/6)+……+1-1/9900
=(1+1+……+1)-[(1/2)+(1/6)+……+(1/9900)]
=99-[1-(1/2)+(1/2)-(1/3)+(1/3)-(1/4)+……(1/99)-(1/100)]
=99-(99/100)
=
1/2+5/6+11/12+19/20+...+9898/9900
1/2+5/6+11/12+19/20如何解
1/2+5/6+11/12+19/20+20/30怎么做,
1+1/2+5/6+11/12+19/20+……+9899/9900=?
找规律填空:1/2、5/6、11/12、19/20、( )、41/42
1/2+5/6+11/12+19/20+29/30+41/42+55/56=怎麽做?
计算:1/2+5/6+11/12+19/20+……+89/90+109/110=
找规律填数1/2,5/6,11/12,19/20,( ),41/42.
1/2+5/6+11/12+19/20+29/30+41/42=?=多少
1/2+5/6+11/12+19/20+...9701/9702+9899/9900怎么解
1/2+5/6+11/12+19/20+29/30+...+9701/9702+9899/9900
请问:1/2+5/6+11/12+19/20+29/30+.+9701/9702+9899/9900=?
1/2+5/6+11/12+19/20+...+89/90+109/110简便运算十加十加十加十万火急
1/2+5/6+11/12+19/20+...+89/90+109/110的值是?
1/2+5/6-7/12+9/20-11/30.-19/90+21/110
1-3/2+5/6-7/12+9/20-11/30+.-19/90+21/110=?
1/2+5/6+11/12+19/20+.+379/380=
1/2+5/6+11/12+19/20+……+209/210+239/240