题目内容
解比例.
X:36=3:54
0.6:0.8=x:20
:x=
:12
=
.
X:36=3:54
0.6:0.8=x:20
| 1 |
| 2 |
| 8 |
| 12 |
| 2 |
| 7 |
| 8 |
| x |
(1)x:36=3:54,
54x=36×3,
54x÷54=108÷54,
x=2;
(2)0.6:0.8=x:20,
0.8x=0.6×20,
0.8x÷0.8=12÷0.8,
x=15;
(3)
:x=
:12,
x=
×12,
x×
=6×
,
x=9;
(4)
=
,
2x=7×8,
2x÷2=56÷2,
x=28.
54x=36×3,
54x÷54=108÷54,
x=2;
(2)0.6:0.8=x:20,
0.8x=0.6×20,
0.8x÷0.8=12÷0.8,
x=15;
(3)
| 1 |
| 2 |
| 8 |
| 12 |
| 8 |
| 12 |
| 1 |
| 2 |
| 8 |
| 12 |
| 12 |
| 8 |
| 12 |
| 8 |
x=9;
(4)
| 2 |
| 7 |
| 8 |
| x |
2x=7×8,
2x÷2=56÷2,
x=28.
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