题目内容
| 解比例. 8:x=9:7 |
| ||||||||
|
|
(1)8:x=9:7,
9x=8×7,
9x÷9=56÷9,
x=6
;
(2)
:
=x:15,
x=
×15,
x÷
=
÷
,
x=40;
(3)
=
,
0.6x=2×0.15,
0.6x÷0.6=0.3÷0.6,
x=0.5;
(4)
=
,
2.5x=12×7.5,
2.5x=90÷2.5,
x=36.
9x=8×7,
9x÷9=56÷9,
x=6
| 2 |
| 9 |
(2)
| 4 |
| 9 |
| 1 |
| 6 |
| 1 |
| 6 |
| 4 |
| 9 |
| 1 |
| 6 |
| 1 |
| 6 |
| 20 |
| 3 |
| 1 |
| 6 |
x=40;
(3)
| x |
| 2 |
| 0.15 |
| 0.6 |
0.6x=2×0.15,
0.6x÷0.6=0.3÷0.6,
x=0.5;
(4)
| 2.5 |
| 12 |
| 7.5 |
| X |
2.5x=12×7.5,
2.5x=90÷2.5,
x=36.
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