7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/4
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/18 11:59:37
7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56
7/6+13/12+21/20+31/30+43/42+57/56
=1+1/6+1+1/12+1+1/20+1+1/30+1+1/42+1+1/56
=6+1/(2X3)+1/(3X4)+1/(4X5)+1/(5X6)+1/(6X7)+1/(7X8)
=6+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8
=6+1/2-1/8
=6+3/8
=51/8
=1+1/6+1+1/12+1+1/20+1+1/30+1+1/42+1+1/56
=6+1/(2X3)+1/(3X4)+1/(4X5)+1/(5X6)+1/(6X7)+1/(7X8)
=6+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8
=6+1/2-1/8
=6+3/8
=51/8
7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/4
3/2+7/6+13/12-21/20+31/30-43/42+57/56+73/72
7/6 + 13/12 +21/20+31/30+43/42+57/56+73/72+91/90 简便计算
7/6+13/12+21/20+30/31+42/43+57/56+73/72+91/90=?
找规律进行简便计算7/6 + 13/12 + 21/21 + 31/30 + 43/42 + 57/56 + 73/72
6分之7+12分之13 +20分之21+30分之31+42分之43=?
7/6+13/12+21/20+31/30+43/42=
6分之7+12分之13+20分之21+30分之31+42分之43+56分之57的简便运算
2分之3+6分之7+12分之13+20分之21+30分之31+42分之43+56分之57等于多少
7/6+3/12+21/20+31/30+43/42+57/56+73/72+91/90怎样简便运算
7/6+13/12+21/20+31/30+.421/420
1/2=1分之2 6/7+12/13+20/21+42/43+56/57+72/73+90/91+110/111+132