1*3/11+3*5/11+5*7/11.97*99/11题怎么做?11/1*3+11/3*5+11/5*7......11/97*99题怎么做?
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1*3/11+3*5/11+5*7/11.97*99/11题怎么做?11/1*3+11/3*5+11/5*7......11/97*99题怎么做?1*3/11+3*5/11+5*7/11.97*99/
1*3/11+3*5/11+5*7/11.97*99/11题怎么做?11/1*3+11/3*5+11/5*7......11/97*99题怎么做?
1*3/11+3*5/11+5*7/11.97*99/11题怎么做?
11/1*3+11/3*5+11/5*7......11/97*99题怎么做?
1*3/11+3*5/11+5*7/11.97*99/11题怎么做?11/1*3+11/3*5+11/5*7......11/97*99题怎么做?
1*3/11+3*5/11+5*7/11.97*99/11
=11*(1-3/1+3/1-5/1+6/1-7/1+……+97/1-99/1)÷2
=11*(1-99/1)÷2
=11*99/49
=9/49
巧算:(11-11/36)+(9-11/36*5)+(7-11/36*3)+(5-11/36*9)+(3-11/36*7)+(1-11/36*11)
(11-11/36)+(9-11/36*5)-(1-11/36*3)+(5-11/36*9)+(3-11/36*7)+(7-11/36*11)
(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
11/3×(5/7-2/5)-11/3×5/7+22/3×1/5是乘号
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
计算:1-3 5-7 9-11
2-1/11-3/11-7/11 3/4-(1/5-1/4) 简便算啊.
『数学』组合性质C(1,11)+C(3,11)+C(5,11)+C(7,11)+C(9,11)+C(11,11)=
5 7 -5 3 9 -1 11 -3 1
计算:1/3*5+1/5*7+1/7*9+1/9*11+1/11*13
3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
16/11-7/12+3/11-5/12-1/11递等式计算七点半之前就要!
计算:2/3*5+1/5*7+1/7*9+1/9*11+1/11*13
(6/5+9/11+1又5/7)/(3/11+2/5+4/7)简便计算