276+228+353+219怎样简便
1个回答

276+228+353+219

=(300-24)+(200+20+8)+(300+50+3)+(200+10+9)

=(300-24)+[200+20+300+50+200+10+8+(2+1)+9]

=300-24+700+80+8+2+1+9

=300-24+700+100

=1100-20-4

=1080-4

=1076

回答完毕,