2008+2018+1998+2028+1988简便计算
问题描述:
2008+2018+1998+2028+1988简便计算
答
2008+2018+1998+2028+1988
=2000+8+2000+18+2000-2+2000+28+2000-2
=2000*5+(8+18+28-2-2)
=10000+50
=10050