题目内容
| 1 |
| 5 |
| 1 |
| 2 |
(1)
:
=(
×10):(
×10)
=2:5;
(2)
:
=
÷
=
×2
=
;
故答案为:2:5,
.
| 1 |
| 5 |
| 1 |
| 2 |
=(
| 1 |
| 5 |
| 1 |
| 2 |
=2:5;
(2)
| 1 |
| 5 |
| 1 |
| 2 |
=
| 1 |
| 5 |
| 1 |
| 2 |
=
| 1 |
| 5 |
=
| 2 |
| 5 |
故答案为:2:5,
| 2 |
| 5 |
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