先化简比,再求比值: 5 8 :15=0.8: 3 4 =1

先化简比,再求比值: 5 8 :15=0.8: 3 4 =1.5: 3 5 =
2024-11-18 04:19:01
推荐回答(1个)
回答1:

(1)
5
8
:15=(
5
8
×
8
5
):(15×
8
5
)=1:24;
5
8
:15=
5
8
÷15=
1
24


(2)0.8:
3
4
=(0.8×20):(
3
4
×20)=16:15;
0.8:
3
4
=0.8÷
3
4
=
16
15


(3)1.5:
3
5
=(1.5×
10
3
):(
3
5
×
10
3
)=5:2;
1.5:
3
5
=1.5÷
3
5
=
5
2

故答案为:1:24,
1
24
;16:15,
16
15
;5:2,
5
2