文档介绍：9+5=9+5=14141015441012-4=12-4=881022106224+4=24+40=286420442086035-2=35-20=331530553031026+8=26+8=343420643014435-8=35-8=27272015530735+4=15+4=65+4=9+3=29+3=59+3=9**********-6=19-6=89-6=11-7=41-7=91-7=3**********+3=64+3=27+2=18+30=41+20=29+60=55672948618928-8=65-2=35-4=21-10=73-50=84-40=206331112344