几道简算333*666=2005*20062006-2006*20052005=(44332-443.32)/(88664-886.64)=0.1+0.3+0.5+0.7+0.9+0.11+0.11+0.13+...+0.95-0.97+0.99=100+99-98+97-96...+3-2+1=1989*1999-1988*2000=9999*2222+3333*3334=10*10-9*9+8*8-7*7+...+2*2-1*1=(1+1.2)+(2+1.2*2)+(3+1.

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