小学分数计算题

1/12+(5/12+6/12)*11/24
1/12+11/12*11/24
1/12+121/288
24/288+121/288
145/288

1/12+(5/12+1/2)*11/24
＝1/12+(5/12+6/12)*11/24
=1/12+11/12*11/24
=1/12+121/288
=24/288+121/288
=145/288

=1/12+（5/12+6/12）*11/24
=1/12+11/12*11/24
=1/12+121/288
=24/288+121/288
=145/288
应该没错吧

1/12+(5/12+1/2)*11/24
=1/12+(5/12+1/2)*(1/12)*(11/2) 把11/24分解
=1/12*{1+[(5/12+1/2)*(11/2)]} 提取公因式1/12
=1/12*[1+(11/12)*(11/2)] 通分,合并
=1/12*(1+121/24)
=1/12*(145/24)
=145/288
这种题型有很多种解法,都是按照哪部分先运算而过程不同，它主要考察的是你的通分水平及分式相乘.别的好象就没有什么特别的.

1/12+(5/12+1/2)*11/24
=1/12+6/12*11/24
=1/12+11/48
=4/48+11/48
=15/48 =3/16
楼上的你们几年级,怎么这么做?有没有看题目?

5/12+1/2=11/12
11/12*11/24=121/288
121/288+1/12=145/288