7.5/0.25+2.5/0.25=40我觉的还是直接7.5+2.5=10,10/0.25=40这个简单
没有简便计算,最简单的是老老实实地算(7.5+2.5)÷0.25=10÷2.5=40
(7.5+2.5)÷0.25=(7.5+2.5)÷1/4=(7.5+2.5)×4=10÷2.5=40不会的可以再问我O(∩_∩)O哈!
7.5÷0.25+2.5÷0.25=30+10=40