题目内容
解下列比例.
(1)9:x=1.5:3
(2)3.8:x=0.8:1.2
(3)
:x=
:2.
(1)9:x=1.5:3
(2)3.8:x=0.8:1.2
(3)
| 3 |
| 5 |
| 1 |
| 3 |
(1)9:x=1.5:3
1.5x=9×3
1.5x÷1.5=27÷1.5
x=18;
(2)3.8:x=0.8:1.2
0.8x=3.8×1.2
0.8x÷0.8=4.56÷0.8
x=5.7;
(3)
:x=
:2
x=
×2
x÷
=
÷
x=3.6.
1.5x=9×3
1.5x÷1.5=27÷1.5
x=18;
(2)3.8:x=0.8:1.2
0.8x=3.8×1.2
0.8x÷0.8=4.56÷0.8
x=5.7;
(3)
| 3 |
| 5 |
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 3 |
| 1 |
| 3 |
| 6 |
| 5 |
| 1 |
| 3 |
x=3.6.
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