题目内容
| 化简比并求比值. (1)12:30 |
(2)0.4:3.2 | (3)
|
(1)12:30,
=(12÷6):(30÷6),
=2:5;
12:30,
=2:5,
2÷5,
=
.
(2)0.4:3.2,
=(0.4×5):(3.2×5),
=2:16,
=1:8;
0.4:3.2,
=1:8,
=1÷8,
=
.
(3)
:
,
=(
×18):(
×18),
=12:5;
:
,
=12:5,
=12÷5,
=
.
=(12÷6):(30÷6),
=2:5;
12:30,
=2:5,
2÷5,
=
| 2 |
| 5 |
(2)0.4:3.2,
=(0.4×5):(3.2×5),
=2:16,
=1:8;
0.4:3.2,
=1:8,
=1÷8,
=
| 1 |
| 8 |
(3)
| 2 |
| 3 |
| 5 |
| 18 |
=(
| 2 |
| 3 |
| 5 |
| 18 |
=12:5;
| 2 |
| 3 |
| 5 |
| 18 |
=12:5,
=12÷5,
=
| 12 |
| 5 |
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