题目内容
解比例
=
;
x:1
=
:1
;
:
=0.4:x;
=
.
| 0.75 |
| x |
| 3 |
| 2 |
x:1
| 3 |
| 5 |
| 5 |
| 8 |
| 3 |
| 4 |
| 2 |
| 9 |
| 5 |
| 9 |
| 1.25 |
| 0.25 |
| x |
| 8 |
(1)
=
,
3x=0.75×2,
3x=1.5,
3x÷3=1.5÷3,
x=0.5;
(2)x:1
=
:1
,
1
x=1
×
,
1
x=1,
1
x÷1
=1÷1
,
x=
;
(3)
:
=0.4:x,
x=
×0.4,
x÷
=
÷
,
x=1;
(4)
=
,
0.25x=1.25×8,
0.25x=10,
0.25x÷0.25=10÷0.25,
x=40.
| 0.75 |
| x |
| 3 |
| 2 |
3x=0.75×2,
3x=1.5,
3x÷3=1.5÷3,
x=0.5;
(2)x:1
| 3 |
| 5 |
| 5 |
| 8 |
| 3 |
| 4 |
1
| 3 |
| 4 |
| 3 |
| 5 |
| 5 |
| 8 |
1
| 3 |
| 4 |
1
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=
| 4 |
| 7 |
(3)
| 2 |
| 9 |
| 5 |
| 9 |
| 2 |
| 9 |
| 5 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
x=1;
(4)
| 1.25 |
| 0.25 |
| x |
| 8 |
0.25x=1.25×8,
0.25x=10,
0.25x÷0.25=10÷0.25,
x=40.
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