题目内容
| 8:30=24:x |
| 3:x=9:15 | ||||||||||
| 1.25:0.25=x:1.6 |
|
|
(1)8:30=24:x
8x=30×24,
x=90;
(2)
:
=x:9
x=
×9,
x=
;
(3)3:x=9:15
9x=3×15,
x=5;
(4)1.25:0.25=x:1.6
0.25x=1.25×1.6,
x=8;
(5)
=
4.5x=9×0.8,
x=1.6;
(6)
:
=
:x
x=
×
,
x=
.
8x=30×24,
x=90;
(2)
| 2 |
| 3 |
| 5 |
| 6 |
| 5 |
| 6 |
| 2 |
| 3 |
x=
| 36 |
| 5 |
(3)3:x=9:15
9x=3×15,
x=5;
(4)1.25:0.25=x:1.6
0.25x=1.25×1.6,
x=8;
(5)
| x |
| 9 |
| 0.8 |
| 4.5 |
4.5x=9×0.8,
x=1.6;
(6)
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
x=
| 3 |
| 20 |
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