3/2+13/6+37/12+81/20+151/30+253/42+393/56
来源:学生作业帮 编辑:灵鹊做题网作业帮 分类:数学作业 时间:2024/06/14 07:37:14
3/2+13/6+37/12+81/20+151/30+253/42+393/56
简便运算
我只剩这一题了
简便运算
我只剩这一题了
3/2+13/6+37/12+81/20+151/30+253/42+393/56
=(1+1/2)+(2+1/6)+(3+1/12)+(4+1/20)+(5+1/30)+(6+1/42)+(7+1/56)
=(1+……+7)+[(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)]
=28+1-1/8
=231/8
=(1+1/2)+(2+1/6)+(3+1/12)+(4+1/20)+(5+1/30)+(6+1/42)+(7+1/56)
=(1+……+7)+[(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)]
=28+1-1/8
=231/8
3/2+13/6+37/12+81/20+151/30+253/42+393/56
3/2+13/6+37/12+81/20+151/30+253/42+393/56+577/72+730/81+1101
3/2+13/6+37/12+81/20+151/30+253/42+393/56+577/72等于几
1+13/6+37/12+81/20+151/30+253/42+393/56+577/72【简算】
3+13/6+37/12+81/20+151/30+253/42+393/56+577/72+811/90怎样简算?
3/2-17/6+37/12-99/20+151/30-293/42+393/56-647/72+811/90等于多少,
(答得好给悬赏)3/2+13/6+37/12+85/20+151/30+252/42+392/56
2\3-6\2+12\7-20\9+30\11-42\13+56\15 (简算)
3/2-5/6+7/12-9/20+11/30-13/42+15/56求解答
3\2-5\6+7\12-9\20+11\30-13\42+15\56
3/2+7/6+13/12-21/20+31/30-43/42+57/56+73/72
3/2-5/6+7/12-9/20+11/30-13/42+15/56等于多少