1994+1995+1998+1996+2017
=(1994+6+1995+5+1998+2+1996+4+2000)+
(17-6-5-2-4)
=(2000+2000+2000+2000+2000)+0
=2000*5
=10000
原式=1994+6+1995+5+1996+4+2000+2
=2000*4+2
=8002
1994+1995+1998+1996+2017
=1994+1995+1996+1997+1998+20
=1996x5+20
=2000x5 -4x5+20
=10000 -20+20
=10000
=(2000-6)+(2000-5)+(2000-2)+(2000-4)+(2000+17)
=(2000+2000+2000+2000+2000)+(17-6-5-2-4)
=10000+0
=10000