(12/7+24/19)÷24/195/16×(8/5+4/5)×8/1(9/5-18/5)÷9/5{16/15+(16/7-8/3)}÷4/19/4÷{5/4-(5/1+3/1)}

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 12:31:45
(12/7+24/19)÷24/195/16×(8/5+4/5)×8/1(9/5-18/5)÷9/5{16/15+(16/7-8/3)}÷4/19/4÷{5/4-(5/1+3/1)}(12/7+24/

(12/7+24/19)÷24/195/16×(8/5+4/5)×8/1(9/5-18/5)÷9/5{16/15+(16/7-8/3)}÷4/19/4÷{5/4-(5/1+3/1)}
(12/7+24/19)÷24/19
5/16×(8/5+4/5)×8/1
(9/5-18/5)÷9/5
{16/15+(16/7-8/3)}÷4/1
9/4÷{5/4-(5/1+3/1)}

(12/7+24/19)÷24/195/16×(8/5+4/5)×8/1(9/5-18/5)÷9/5{16/15+(16/7-8/3)}÷4/19/4÷{5/4-(5/1+3/1)}
(12/7+24/19)÷24/19
=(12/7+24/19)×19/24
=12/7×19/24+24/19×19/24
=19/14+1
=1又19/14
5/16×(8/5+4/5)×8/1
=5/16×8/1×(8/5+4/5)
=5/2×8/5+5/2×4/5
=4/1+2/1
=4/3
(9/5-18/5)÷9/5
=(9/5-18/5)×5/9
=9/5×5/9-18/5×5/9
=1-2/1
=2/1
{16/15+(16/7-8/3)}÷4/1
={16/15+(16/7-8/3)}×4
=16/15×4+16/7×4-8/3×4
=4/15+4/7-2/3
=2/11-2/3
=4
9/4÷{5/4-(5/1+3/1)}
=9/4÷{5/4-5/1-3/1}
=9/4÷{5/3-3/1}
=9/4÷15/4
=3/5

分子分母写反了!
(7/12+19/24)÷19/24=7/12×24/19+19/24×24/19=14/19+1=33/19
16/5×(5/8+5/4)×1/8=2/5×5/8+2/5×5/4=1/4+1/2=3/4
(5/9-5/18)÷5/9=5/9×9/5-5/18×9/5=1-1/2=1/2
〔15/16+(7/16-3/8)]÷1/4=(22/16-3/8)×4=22/4-3/2=16/4=4
4/9÷[4/5-(1/5+1/3)]=4/9÷(3/5-1/3)=4/9÷4/15=15/9=5/3

11/28
6
-1
326/105
-1/3

我教你个方法:
1.分数除法就是除号变乘号,分子分母倒一到。
2.用乘法分配律会简单很多。

(12/7+24/19)÷24/19
=(12/7+24/19)×19/24
=12/7×19/24+24/19×19/24
=19/14+1
=1 19/14
5/16×(8/5+4/5)×8/1
=5/16×12/5×8/1
=6
(9/5-18/5)÷9/5
=(9/5-18/5)×5/9
=9/5×5/9-18...

全部展开

(12/7+24/19)÷24/19
=(12/7+24/19)×19/24
=12/7×19/24+24/19×19/24
=19/14+1
=1 19/14
5/16×(8/5+4/5)×8/1
=5/16×12/5×8/1
=6
(9/5-18/5)÷9/5
=(9/5-18/5)×5/9
=9/5×5/9-18/5×5/9
=1-2
=1/2
{16/15+(16/7-8/3)}÷4/1
={16/15+(16/7-8/3)}×1/4
=16/15×4+16/7×4-8/3×1/4
=4/15+4/7-2/3
=2/11-2/3
=4
9/4÷{5/4-(5/1+3/1)}
=9/4÷{5/4-5/1-3/1}
=9/4÷{5/3-3/1}
=9/4÷15/4
=3/5

收起

不难。
1`(12/7+24/19)÷24/19=(24/14+24/19)÷24/19=24/33÷24/19=24/33×19/24=19/33
2`25/16×(8/5+4/5)×8/1=25/16×5/12
×8/1=125/192×8/1=125/24
3`(9/5-18/5)÷9/5=(18/10-18/5)÷9/5=18/5÷9/5=18/5×5/9=...

全部展开

不难。
1`(12/7+24/19)÷24/19=(24/14+24/19)÷24/19=24/33÷24/19=24/33×19/24=19/33
2`25/16×(8/5+4/5)×8/1=25/16×5/12
×8/1=125/192×8/1=125/24
3`(9/5-18/5)÷9/5=(18/10-18/5)÷9/5=18/5÷9/5=18/5×5/9=25/162
4`{16/15+(16/7-8/3)}÷4/1={16/15+(16/7-16/6)}÷4/1={16/15+16/1}÷4/1=1÷4/1=1×4=4
5`9/4÷{5/4-(5/1+3/1)} =9/4÷{5/4-(15/3+15/5)}=9/4÷{15/12-15/8}=9/4×4/15=3/5
很简单,看看就会,我是6年级,哈哈o(∩_∩)o...哈哈

收起

(12/7+24/19)÷24/19
=(12/7+24/19)×19/24
=12/7×19/24+24/19×19/24
=19/14+1
=1又19/14
5/16×(8/5+4/5)×8/1
=5/16×8/1×(8/5+4/5)
=5/2×8/5+5/2×4/5
=4/1+2/1
=4/3
(9/5-18/5...

全部展开

(12/7+24/19)÷24/19
=(12/7+24/19)×19/24
=12/7×19/24+24/19×19/24
=19/14+1
=1又19/14
5/16×(8/5+4/5)×8/1
=5/16×8/1×(8/5+4/5)
=5/2×8/5+5/2×4/5
=4/1+2/1
=4/3
(9/5-18/5)÷9/5
=(9/5-18/5)×5/9
=9/5×5/9-18/5×5/9
=1-2/1
=2/1
{16/15+(16/7-8/3)}÷4/1
={16/15+(16/7-8/3)}×4
=16/15×4+16/7×4-8/3×4
=4/15+4/7-2/3
=2/11-2/3
=4
9/4÷{5/4-(5/1+3/1)}
=9/4÷{5/4-5/1-3/1}
=9/4÷{5/3-3/1}
=9/4÷15/4
=3/5

收起