题目内容
(1)6:12
(2)0.2:0.05
(3)
:
(4)21:42
(5)
:
(6)
:
.
(2)0.2:0.05
(3)
| 9 |
| 20 |
| 9 |
| 2 |
(4)21:42
(5)
| 3 |
| 4 |
| 9 |
| 16 |
(6)
| 24 |
| 25 |
| 48 |
| 50 |
(1)6:12=(6÷6):(12÷6)=1:2,
比值是:1:2=1÷2=
;
(2)0.2:0.05=(0.2×100):(0.05×100),
=20:5;
=(20÷5):(5÷5),
=4:1,
比值是:4:1=4÷1=4;
(3)
:
=
÷
=
×
=
=1:10,
比值是:
,
(4)21:42=(21÷21):(42÷21)=1:2,
比值是:1:2=
;
(5)
:
=
÷
=
×
=
,
比值是:
;
(6)
:
=
÷
=
×
=1:1,
比值是:1.
比值是:1:2=1÷2=
| 1 |
| 2 |
(2)0.2:0.05=(0.2×100):(0.05×100),
=20:5;
=(20÷5):(5÷5),
=4:1,
比值是:4:1=4÷1=4;
(3)
| 9 |
| 20 |
| 9 |
| 2 |
| 9 |
| 20 |
| 9 |
| 2 |
| 9 |
| 20 |
| 2 |
| 9 |
| 1 |
| 10 |
比值是:
| 1 |
| 10 |
(4)21:42=(21÷21):(42÷21)=1:2,
比值是:1:2=
| 1 |
| 2 |
(5)
| 3 |
| 4 |
| 9 |
| 16 |
| 3 |
| 4 |
| 9 |
| 16 |
| 3 |
| 4 |
| 16 |
| 9 |
| 4 |
| 3 |
比值是:
| 4 |
| 3 |
(6)
| 24 |
| 25 |
| 48 |
| 50 |
| 24 |
| 25 |
| 48 |
| 50 |
| 24 |
| 25 |
| 50 |
| 48 |
比值是:1.
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