题目内容
解方程或解比例
5.4X+2.6X=840
8X-
=
:X=2.1:
.
5.4X+2.6X=840
8X-
| 1 |
| 3 |
| 1 |
| 9 |
| 7 |
| 8 |
| 8 |
| 15 |
(1)5.4X+2.6X=840,
(5.4+2.6)X=840,
8X=840,
8X÷8=840÷8,
X=105;
(2)8X-
=
,
8X-
+
=
+
,
8X=
,
8X÷8=
÷8,
X=
×
,
X=
;
(3)
:X=2.1:
,
2.1X=
×
,
2.1X=
,
2.1X÷2.1=
÷2.1,
X=
÷
,
X=
×
,
X=
.
(5.4+2.6)X=840,
8X=840,
8X÷8=840÷8,
X=105;
(2)8X-
| 1 |
| 3 |
| 1 |
| 9 |
8X-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
8X=
| 4 |
| 9 |
8X÷8=
| 4 |
| 9 |
X=
| 4 |
| 9 |
| 1 |
| 8 |
X=
| 1 |
| 18 |
(3)
| 7 |
| 8 |
| 8 |
| 15 |
2.1X=
| 7 |
| 8 |
| 8 |
| 15 |
2.1X=
| 7 |
| 15 |
2.1X÷2.1=
| 7 |
| 15 |
X=
| 7 |
| 15 |
| 21 |
| 10 |
X=
| 7 |
| 15 |
| 10 |
| 21 |
X=
| 2 |
| 9 |
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