化简比并求比值1小时20分:2小时10分 123:7 327:586:49.
(1)1小时20分:2小时10分
=80分:130分
=80:130
=(80÷10):(130÷10)
=8:13;
1小时20分:2小时10分
=80分:130分
=80:130
=80÷130
=
;
(2)1
:7
=(1
×3):(7×3)
=5:21;
1
:7
=1
÷7
=
;
(3)3
:
=(3
×56):(
×56)
=184:35;
3
:
=3
÷
=
;
(4)6:
=(6×
):(
×
)
=27:2;
6:
=6÷
=13.5.
=80分:130分
=80:130
=(80÷10):(130÷10)
=8:13;
1小时20分:2小时10分
=80分:130分
=80:130
=80÷130
=
8 |
13 |
(2)1
2 |
3 |
=(1
2 |
3 |
=5:21;
1
2 |
3 |
=1
2 |
3 |
=
5 |
21 |
(3)3
2 |
7 |
5 |
8 |
=(3
2 |
7 |
5 |
8 |
=184:35;
3
2 |
7 |
5 |
8 |
=3
2 |
7 |
5 |
8 |
=
184 |
35 |
(4)6:
4 |
9 |
=(6×
9 |
2 |
4 |
9 |
9 |
2 |
=27:2;
6:
4 |
9 |
=6÷
4 |
9 |
=13.5.
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