题目内容
解比例.
(1)8:x=12:4
(2)
=
(3)
:
=
:x
(4)0.16:
=x:15.
(1)8:x=12:4
(2)
| x |
| 2.5 |
| 18 |
| 4.5 |
(3)
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 8 |
(4)0.16:
| 4 |
| 5 |
(1)8:x=12:4,
12x=8×4,
12x÷12=32÷12,
x=
;
(2)
=
,
4.5x=2.5×18,
4.5x÷4.5=45÷4.5,
x=10;
(3)
:
=
:x,
x=
×
,
x÷
=
÷
,
x=
;
(4)0.16:
=x:15,
x=0.16×15,
x÷
=2.4÷
,
x=3.
12x=8×4,
12x÷12=32÷12,
x=
| 8 |
| 3 |
(2)
| x |
| 2.5 |
| 18 |
| 4.5 |
4.5x=2.5×18,
4.5x÷4.5=45÷4.5,
x=10;
(3)
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 8 |
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 8 |
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 12 |
| 5 |
| 6 |
x=
| 1 |
| 10 |
(4)0.16:
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
x=3.
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