2.53+7.47*0.76怎么用简便方法计算

题目

2.53+7.47*0.76怎么用简便方法计算

答案

2.53+(10-2.53)*0.76
=10*0.76+2.53*(1-0.76)
=7.6+2.53*0.24
=8.2072