题目内容
| 化简比并求比值. 2.4:6 | 0.75:1
| 5:
|
(1)2.4:6,
=(2.4×10):(6×10),
=24:60,
=(24÷12):(60÷12),
=2:5;
2.4:6,
=2.4÷6,
=0.4;
(2)0.75:1
,
=
:
,
=(
×4):(
×4),
=3:5;
0.75:1
,
=
:
,
=
÷
,
=
(3)5:
,
(5×5):(
×5),
=25:1,
5:
,
=5÷
,
=25;
(4)45分:1
小时,
=
小时:
小时,
=
:
,
=(
×12):(
×12),
=9:16;
45分:1
小时,
=
小时:
小时,
=
:
,
=
:
,
=
.
=(2.4×10):(6×10),
=24:60,
=(24÷12):(60÷12),
=2:5;
2.4:6,
=2.4÷6,
=0.4;
(2)0.75:1
| 1 |
| 4 |
=
| 3 |
| 4 |
| 5 |
| 4 |
=(
| 3 |
| 4 |
| 5 |
| 4 |
=3:5;
0.75:1
| 1 |
| 4 |
=
| 3 |
| 4 |
| 5 |
| 4 |
=
| 3 |
| 4 |
| 5 |
| 4 |
=
| 3 |
| 5 |
(3)5:
| 1 |
| 5 |
(5×5):(
| 1 |
| 5 |
=25:1,
5:
| 1 |
| 5 |
=5÷
| 1 |
| 5 |
=25;
(4)45分:1
| 1 |
| 3 |
=
| 3 |
| 4 |
| 4 |
| 3 |
=
| 3 |
| 4 |
| 4 |
| 3 |
=(
| 3 |
| 4 |
| 4 |
| 3 |
=9:16;
45分:1
| 1 |
| 3 |
=
| 3 |
| 4 |
| 4 |
| 3 |
=
| 3 |
| 4 |
| 4 |
| 3 |
=
| 3 |
| 4 |
| 4 |
| 3 |
=
| 9 |
| 16 |
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