题目内容
解方程或解比例:
①0.75:1.25=x:2
②0.4×3-4X=0.08
③
:
=x:
④x-0.8x-6=16.
①0.75:1.25=x:2
②0.4×3-4X=0.08
③
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
④x-0.8x-6=16.
(1)0.75:1.25=x:2,
1.25x=0.75×2,
1.25x÷1.25=1.5÷1.25,
x=1.2;
(2)0.4×3-4X=0.08,
1.2-4X=0.08,
1.2-4X+4X=0.08+4X,
1.2-0.08=0.08+4X-0.08,
1.12÷4=4X÷4,
X=0.28;
(3)
:
=x:
,
x=
×
,
x×4=
×4,
x=
;
(4)x-0.8x-6=16,
0.2x-6=16,
0.2x-6+6=16+6,
0.2x÷0.2=22÷0.2,
x=110.
1.25x=0.75×2,
1.25x÷1.25=1.5÷1.25,
x=1.2;
(2)0.4×3-4X=0.08,
1.2-4X=0.08,
1.2-4X+4X=0.08+4X,
1.2-0.08=0.08+4X-0.08,
1.12÷4=4X÷4,
X=0.28;
(3)
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 4 |
| 2 |
| 15 |
x=
| 8 |
| 15 |
(4)x-0.8x-6=16,
0.2x-6=16,
0.2x-6+6=16+6,
0.2x÷0.2=22÷0.2,
x=110.
练习册系列答案
相关题目