题目内容
一桶中装有豆油,油和桶共重50千克,第一次倒出豆油的一半少4千克,第二次倒出余下豆油的
还多2
千克,这时剩下的豆油和桶共重6
千克,求原来桶中有豆油多少千克?
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
设这桶豆油有x千克,
第一次倒出的油:
x-4,
第二次倒出的油:[x-(
x-4)]×
+2
,
=[
x+4]×
+2
,
=
x+3+2
,
=
x+5
,
50-(
x-4+
x+5
)=6
,
50-(
x+1
)=6
,
50-
x-1
=6
,
48
-
x+
x=6
+
x,
48
-6
=
x,
42÷
=
x÷
,
x=48.
答:这桶豆油重48千克.
第一次倒出的油:
| 1 |
| 2 |
第二次倒出的油:[x-(
| 1 |
| 2 |
| 3 |
| 4 |
| 2 |
| 3 |
=[
| 1 |
| 2 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 3 |
| 8 |
| 2 |
| 3 |
=
| 3 |
| 8 |
| 2 |
| 3 |
50-(
| 1 |
| 2 |
| 3 |
| 8 |
| 2 |
| 3 |
| 1 |
| 3 |
50-(
| 7 |
| 8 |
| 2 |
| 3 |
| 1 |
| 3 |
50-
| 7 |
| 8 |
| 2 |
| 3 |
| 1 |
| 3 |
48
| 1 |
| 3 |
| 7 |
| 8 |
| 7 |
| 8 |
| 1 |
| 3 |
| 7 |
| 8 |
48
| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 8 |
42÷
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
x=48.
答:这桶豆油重48千克.
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