12.34+23.41+34.12+41.32
1个回答

12.34+23.41+34.12+41.32

=12+23+34+41+(0.34+0.41+0.12+0.32)

=110+1.19

=111.19

我用的是分解法,

=(10+20+30+40)+(1+2+3+4)+(0.1+0.3+0.3+0.4)+(0.01+0.02+0.02+0.04)

=100+10+1.1+0.09

=111.19