7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/15 12:46:41
![7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56](/uploads/image/z/74305-1-5.jpg?t=7%2F6%2B13%2F12%2B21%2F20%2B31%2F30%2B43%2F42%2B57%2F56+7%2F6%2B13%2F12%2B21%2F20%2B31%2F30%2B43%2F42%2B57%2F56)
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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 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
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
7/6+13/12+21/20+31/30+.421/420
3/2+7/6+13/12+21/20+31/30(简便计算).
3/2+7/6+13/12-21/20+31/30-43/42+57/56+73/72
6-2分之3-6分之7-12分之13-20分之21-30分之31=?简算
7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56
2/3+7/6+12/13+20/21+30/31+……+9702/9703+9900/9901请详细解说,
2分之3+6分之7+12分之13+20分之21+30分之31+42分之43=
6分之7+12分之13+20分之21+30分之31+~+420分之421
7/6+13/12+21/20+31/30+…+421/420
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=?
小学简便方法运算!1.(17/11+18/21+19/31+20/41)×(18/21+19/31+20/41+21/51)-(17/11+18/21+19/31+20/41+21/51)×(18/21+19/31+20/41)2.3/(1×5)+3/(5×9)+3/(9×13)+3/(13×17)+…+3/(17×21)3.5/6-7/12+9/20-11/30+13/42
12÷7×3/14 怎么简算?1/6 + 13/12 + 21/20 + 31/30 + 1/42 + 57/56怎么简算?
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=?
7/6+13/12+21/20+31/30+43/42+57/56+73/72+93/92=?
((-14/5)^4*(-10/7)^3*(-5/12)^2*(-3/20)^1)/|5/6-13/12+19/20-31/30|
1,3,7,13,21,31,43,( )