3.9与1.2的3倍的和除3/4与1/4的差得多少
来源:百度知道 编辑:UC知道 时间:2024/09/23 01:38:52
3.9与1.2的3倍的和除3/4与1/4的差得多少
(3/4-1/4)/(3.9+1.2*3)
=(1/2)/7.5
=1/15
(3.9+1.2×3)÷(3/4-1/4)
=(3.9+3.6)÷1/2
=7.5÷0.5
=75÷5
=15
应该加一个字是:3.9与1.2的3倍的和除"以"3/4与1/4的差得多少???
(3.9+1.2*3)/(3/4-1/4)=15
(3.9+1.2*3)/[(3/4)-(1/4)]=7.5/(1/2)=15
(3.9+3*1.2)/(3/4-1/4)
=(3.9+3.6)/0.5
=7.5/0.5
=15
1.5