9又3/1+99又3/1+999又3/1+9999又3/1+2又3/2
=10+100+1000+10000+3-3/1×5
=11113-3/5
=11111又3/1
9又3/1+99又3/1+999又3/1+9999又3/1+2又3/2
=9+1/3+99+1/3+99+1/3+9999+1/3+2+1/3
=(9+1)+(99+1)+999+9999+(1/3+1/3+1/3)+(1/3+2/3)
=10+100+(999+1)+(9999+1)
=110+1000+10000
=11110
333X334+999X222
=333X334+333X666
=333×(334+666)
=333×1000
=333000
原式=10-2/3 +100-2/3 +1000-2/3 +10000-2/3 +2 +2/3
=(10+100+1000+10000)+2-(3×2/3)
=11111+2-2
=11111