Question

六年级有难度的计算题多点

Answer 1

2002+2001-2000-1999+1998+1997-1996-1995+……+2+1=

1/1*2*3+1/2*3*4+.+1/98*99*100

1+1/2)(1+1/3)(1+1/4).(1+1/100)

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(1-1/2)(1-1/3)(1-1/4).(1-1/100)