1/3*7+ 1/7/11+1/11*15+.+1/55*59
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/30 15:13:08
1/3*7+1/7/11+1/11*15+.+1/55*591/3*7+1/7/11+1/11*15+.+1/55*591/3*7+1/7/11+1/11*15+.+1/55*591/3*7+1/7*
1/3*7+ 1/7/11+1/11*15+.+1/55*59
1/3*7+ 1/7/11+1/11*15+.+1/55*59
1/3*7+ 1/7/11+1/11*15+.+1/55*59
1/3*7+ 1/7*11+1/11*15+.+1/55*59
=1/4*(1/3-1/7)+1/4*(1/7-1/11)+1/4*(1/11-1/15)+.+1/4*(1/55-1/59)
=1/4*(1/3-1/7+1/7-1/11+1/11-1/15+.+1/55-1/59)
=1/4*(1/3-1/59)
=1/4*56/177
=14/177
计算:1/3*5+1/5*7+1/7*9+1/9*11+1/11*13
11分之1÷7+11分之1×7分之1+11分之4×7分之1+11分之6÷7+11分之3÷7
(1)11分之5乘23 (2)(1+11分之7)+(2+11分之7*2)+(3+11分之7*3)+.+(11+11分之7*11)简算
观察;1/3*7=(1/3-1/7)*1/4,1/7*11=(1/7-1/11)*1/4,计算:1/3*7+1/7*11+1/11*15+...+1/55*99
简便计算7/11×1/7×10/7×7/11
计算:2/3*5+1/5*7+1/7*9+1/9*11+1/11*13
1/3*7+1/7*11+1/11*15+...+1/25*39
如何计算1/(3*7)+1/(7*11)+1/(11*15)+.+1/(39*43)=
1/3*7+1/7*11+1/11*15+...+1/55*59=?
1/3*7+ 1/7/11+1/11*15+.+1/55*59
1/3 1/2 5/11 7/18 1/3
2-1/11-3/11-7/11 3/4-(1/5-1/4) 简便算啊.
1×3/1+3×5/1+5×7/1+7×9/1+9×11/1+11×13/1简便运算
1+3+5+7+9+11+.+99
1-3+5-7+9-11+13
1-3+5-7+9-11+.求救
1+3+5+7+9+11=?
1,3,5,7,9,11,15