题目内容
解方程.
X+
| X÷0.5=5.2 | X-0.2=5.6 | 33X=1.3+2 | 15-X=2.4 |
|
(1)x+
=5,
x+
-
=5-
,
x=4
;
(2)x÷0.5=5.2,
x÷0.5×0.5=5.2×0.5,
x=2.6;
(3)x-0.2=5.6,
x-0.2+0.2=5.6+0.2,
x=5.8;
(4)33x=1.3+2,
33x=3.3,
33x÷33=3.3÷33,
x=0.1;
(5)15-x=2.4,
15-x+x=2.4+x,
15=2.4+x,
15-2.4=24+x-2.4,
x=12.6.
(6)x+
=
,
x+
-
=
-
,
x=
.
| 7 |
| 12 |
x+
| 7 |
| 12 |
| 7 |
| 12 |
| 7 |
| 12 |
x=4
| 5 |
| 12 |
(2)x÷0.5=5.2,
x÷0.5×0.5=5.2×0.5,
x=2.6;
(3)x-0.2=5.6,
x-0.2+0.2=5.6+0.2,
x=5.8;
(4)33x=1.3+2,
33x=3.3,
33x÷33=3.3÷33,
x=0.1;
(5)15-x=2.4,
15-x+x=2.4+x,
15=2.4+x,
15-2.4=24+x-2.4,
x=12.6.
(6)x+
| 1 |
| 4 |
| 3 |
| 5 |
x+
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
x=
| 7 |
| 20 |
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