6.4×0.25+3.6÷4=6.4×0.25+3.6×0.25=(6.4+3.6)×0.25=10×0.25=2.5
6.4×0.25+3.6÷4=6.4×0.25+3.6*0.25=0.25*(6.4+3.6)=2.5
合并同类项就是(6.4+3.6)*0.25=2.5
6.4×0.25+3.6÷4=6.4÷4+3.6÷4=(6.4+3.6)÷4=10÷4=2.5
(6.4+3.6)*0.25