题目内容
解比例.
| 8:30=24:X |
|
| 6.5:x=3.25:4 |
(1)8:30=24:X,
8x=30×24,
8x÷8=720÷8,
x=90;
(2)
:
=X:
,
x=
×
,
x÷
=
÷
,
x=
;
(3)
=
,
40x=×5,
40x÷40=120÷40,
x=3;
(4)6.5:x=3.25:4,
25x=6.5×4,
3.25x÷3.25=26÷3.25,
x=8.
8x=30×24,
8x÷8=720÷8,
x=90;
(2)
| 3 |
| 5 |
| 6 |
| 7 |
| 5 |
| 4 |
| 6 |
| 7 |
| 3 |
| 5 |
| 5 |
| 4 |
| 6 |
| 7 |
| 6 |
| 7 |
| 3 |
| 4 |
| 6 |
| 7 |
x=
| 7 |
| 8 |
(3)
| 40 |
| 24 |
| 5 |
| X |
40x=×5,
40x÷40=120÷40,
x=3;
(4)6.5:x=3.25:4,
25x=6.5×4,
3.25x÷3.25=26÷3.25,
x=8.
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