24/4+6*0.25=

第一种算法：24/4+6*0.25
=6+6*0.25——————算出24/4，得到6
=6+3*0.5——————将6/2，0.25*2，乘积不变，变成3*0.5
=6+1.5———————将3*0.5算出来，得到1.5
=7.5————————将6+1.5算出来，得到7.5
第二种算法：24/4+6*0.25
=24*0.25+6*0.25——————24/4=24*1/4=24*0.25
=（24+6）*0.25——————提取公因数0.25，得到（24+6）*0.25
=30*0.25—————————将24+6，得到30
=7.5———————————将30*0.25，得到7.5

24/4+6*0.25
=24/4+6/4
=(24+6)/4
=30/4
=7.5

24/4+6*0.25
=6+1.5
=7.5

24/4+6*0.25
=24/4+6*(1/4)
=(1/4)(24+6)
=(1/4)*30
=7.5

6+1.5=7.5

24/4+6*0.25=6+1.5=7.5

24/4+6*0.25
=24×0.25+6×0.25
=（24+6）×0.25
=30×0.25
=7.5

24/4+6*0.25= 24*(1/4)+6*(1/4)
=(24+6)*(1/4)
=30*(1/4)
=7.5