运用乘法分配律可使运算简便 5.45×7.9+5.45×1.1+5.45 =5.45×79+5.45×1.1+545×1=5.45×(7.9+1.1+1)=5.45×10 =54.5
5.45×7.9+5.45×1.1+5.45的简便运算方法如下,望采纳5.45×7.9+5.45×1.1+5.45=5.45×(7.9+1.1+1)=5.45×10=54.5
原式=5.45(7.9+1.1+1)=5.45*10=54.5