5一4.99+1+0.11简便运算

问题描述:

5一4.99+1+0.11简便运算

1.1×6.5+54×0.11-11.9 =1.1×6.5+5.4×1.1-11.9 =1.1×(6.5+5.4)-11.9 =1.1×11.9-11.9 =(1.1-1)×11.9 =0.1