标签： 3.8x9.9+0.38的简便运算

3.8x9.9+0.38的简便运算|

3.8x9.9+0.38的简便运算3.8*9.9+0.38的简便运算如下，3.8*9.9+0.38=3.8*9.9+3.8+*0.1=3.8*(9.9+0.1)=3.8...