1/2+5/6+11/12+19/20+.9890/9900=
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1/2+5/6+11/12+19/20+.9890/9900=1/2+5/6+11/12+19/20+.9890/9900=1/2+5/6+11/12+19/20+.9890/9900==(1-1/2
1/2+5/6+11/12+19/20+.9890/9900=
1/2+5/6+11/12+19/20+.9890/9900=
1/2+5/6+11/12+19/20+.9890/9900=
=(1-1/2)+(1-1/6)+(1-1/12)+(1-1/20)+....../9(1-1/9900)=1*99-1/(1*2)-1/(2*3)-1/(3*4)-1/(4*5)-......1/(98*99)-1/(99*100)=99-(1-1/2)-(1/2-1/3)-(1/3-1/4)-(1/4-1/5)-......(1/98-1/99)-(1/99-1/100)=99-1+1/100=98.01
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