5+(1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90)
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/08/15 22:00:29
5+(1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90)
![5+(1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90)](/uploads/image/z/16451442-18-2.jpg?t=5%2B%EF%BC%881%2F2-5%2F6%2B1%2F12-19%2F20%2B1%2F30-41%2F42%2B1%2F56-71%2F72%2B1%2F90%EF%BC%89)
1.原式=1-2+3-4+5-6+7-8+9+1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90
=5+1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90
=1+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
=1+1-1/2+1/2-1/3+1/3-1/4+……+1/9-1/10
=2-1/10
=1又9/10
2.原式=(104/99+104/33+104/11)÷(100/99+100/33+100/11)
=[104*(1/99+1/33+1/11)]÷[100*(1/99+1/33+1/11)]
=104÷100
=26/25
打字不易,
=5+1/2-5/6+1/12-19/20+1/30-41/42+1/56-71/72+1/90
=1+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
=1+1-1/2+1/2-1/3+1/3-1/4+……+1/9-1/10
=2-1/10
=1又9/10
2.原式=(104/99+104/33+104/11)÷(100/99+100/33+100/11)
=[104*(1/99+1/33+1/11)]÷[100*(1/99+1/33+1/11)]
=104÷100
=26/25
打字不易,
1-1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72
1+1/2-2-5/6+3+1/12-4-19/20+5+1/30-6-41/42+7+1/56-8-71/72+9+1
1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72 怎么做 要有过程
2分之1+6分之5+12分之11+20分之19+30分之29+42分之41+56分之55+72分之71+90分之89=?
做出这到题1 1/2-2 5/6+3 1/12-4 19/20+5 1/30-6 41/42+7 1/56-8 71/7
1又1/2-2又5/6+3又1/12-4又19/20+5又1/30-6又41/42+7又1/56-8又71/72+9又1
1又2\1-2又6\5+3又12\1-4又20\19+5又30\1-6又42\41+7又56\1-8又72\71+9又9
1 又1/2-2又5/6+3又1/12-4又19/20-5又1/30+6又41/42-7又1/56+8又71/72-9
1.求1又1/2-2又5/6+3又1/12-4又19/20+5又1/30-6又41/42+7又1/56-8又71/72+
1+1/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/90
1/2+5/6+11/12+19/20+29/30+41/42+55/56=
1又2分之1-2又6分之5+3又12分之1-4又20分之19+5又30分之1-6又42分之41+7又56分之1-8又72