9991+999.1+99.91+9.991的有什么简便方法

2024-11-16 01:42:09
推荐回答(2个)
回答(1):

9991+999.1+99.91+9.991
=99.91x100+99.91x10+99.91+99.91x0.1
=99.91x(100+10+1+0.1)
=99.91x111.1
=11100.001

回答(2):

9991+9.991+999.1+0.91+99
=10000.991+1000.01+99
=11001.001+99
=11100.001