题目内容
|
| x:
| ||||||||||||
0.8:
| 1.25:0.25=
| (x+3):48=9:54. |
(1)
=
,
12x=5×8.4,
12x÷12=42÷12,
x=3.5;
(2)
:
=x:1.6,
x=
×1.6,
x÷
=0.2÷
,
x=1;
(3)x:
=
:4,
4x=
×
,
4x÷4=
÷4,
x=
;
(4)0.8:
=x:8,
x=0.8×8,
x÷
=6.4÷
,
x=25.6;
(5)1.25:0.25=
,
0.25x=1.25×1.6,
0.25x÷0.25=2÷0.25,
x=8;
(6)(x+3):48=9:54,
(x+3)×54=48×9,
54x+162-162=432-162,
54x÷54=270÷54,
x=5.
| 5 |
| x |
| 12 |
| 8.4 |
12x=5×8.4,
12x÷12=42÷12,
x=3.5;
(2)
| 1 |
| 8 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 8 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x=1;
(3)x:
| 1 |
| 2 |
| 2 |
| 3 |
4x=
| 1 |
| 2 |
| 2 |
| 3 |
4x÷4=
| 1 |
| 3 |
x=
| 1 |
| 12 |
(4)0.8:
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
x=25.6;
(5)1.25:0.25=
| x |
| 1.6 |
0.25x=1.25×1.6,
0.25x÷0.25=2÷0.25,
x=8;
(6)(x+3):48=9:54,
(x+3)×54=48×9,
54x+162-162=432-162,
54x÷54=270÷54,
x=5.
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