2\1+6\5+12\11+20\19+30\29...+9900\9899
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![2\1+6\5+12\11+20\19+30\29...+9900\9899](/uploads/image/z/1075598-62-8.jpg?t=2%5C1%2B6%5C5%2B12%5C11%2B20%5C19%2B30%5C29...%2B9900%5C9899)
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2\1+6\5+12\11+20\19+30\29...+9900\9899
2\1+6\5+12\11+20\19+30\29...+9900\9899
2\1+6\5+12\11+20\19+30\29...+9900\9899
2/1+6/5+12/11+20/19+30/29····9702/9701+9900/9899
=99-(2/1+6/1+12/1+20/1+30/1+……+9702/1+9900/1)
=99-(1-2/1+2/1-3/1+3/1-4/1+4/1-5/1+5/1-6/1+……+98/1-99/1+99/1-100/1)
=99-(1-100/1)
=98又100/1
=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