题目内容
(1)
千米:500米(求比值)
(2)
(化简比)
(3)12.6:0.4(化简比)
(4)
=
(5)2.8:4=0.7:x
(6)X:21=5:63.
| 3 |
| 4 |
(2)
| 1 |
| 0.25 |
(3)12.6:0.4(化简比)
(4)
| 1 |
| 4 |
| 0.75 |
| x |
(5)2.8:4=0.7:x
(6)X:21=5:63.
(1)
千米:500米=750米:500米=3:2;
(2)
=1:0.25=100:25=4:1;
(3)12.6:0.4=126:4=63:2;
(4)
=
,
x=4×0.75,
x=3;
(5)2.8:4=0.7:x,
2.8x=4×0.7,
x=1;
(6)X:21=5:63,
63x=21×5,
x=
.
| 3 |
| 4 |
(2)
| 1 |
| 0.25 |
(3)12.6:0.4=126:4=63:2;
(4)
| 1 |
| 4 |
| 0.75 |
| x |
x=4×0.75,
x=3;
(5)2.8:4=0.7:x,
2.8x=4×0.7,
x=1;
(6)X:21=5:63,
63x=21×5,
x=
| 5 |
| 3 |
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