99+9.9+0.99+0.999+1.111
=99+9.9+0.99+0.999+1+0.1+0.01+0.001
=(99+1)+(9.9+0.1)+(0.99+0.01)+(0.999+0.001)
=100+10+1+1
=112
你好,这道题的简便算法如下:
99+9.9+0.99+0.999+1.111
=(99+1)+(9.9+0.1)+(0.99+0.01)+(0.999+0.001)
=100+10+1+1
=112
望采纳。
=(100-1)+(1-0.1)+(1-0.01)+(1-0.001)
=(100+1+1+1)-(1+0.1+0.01+0.001)
=(100+1+1+1-1)-(0.1+0.01+0.001)
=102-0.111
=101.889