1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?
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1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?1/2*
1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?
1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?
1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?
99\100
简算:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
巧算:(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
2×3/1+3×4/1+4×5/1+5×6/1+.199×200/1=?
1+2+3+4+5+6+78
1+2+3+4+5+6+.1000
1 2 3 4 5 6 题
1/2/3/4/5/6题
1+2-3+4-5+6=
3+2+1+4+5+6
1、2、3、4、5、6、答案
1,2,3,4,5,6,
1、2、3、4、5、6、7
1,2,3,4,5,6,7,
1,2,3,4,5,6,
1+(-2)+3+(-4)+5+(-6)+.+(-100)
1,2 ,3,4,5,6,7
1+2-3+4-5+6-7
1 2 3 4 5 6题都做