分数题

Question

上面的是老师用树图的方式来教我们解答类似的题目

Auntie Ann distributed 108 stickers to some children.She gave 18 stickers to each boy and ²/₃ ​​​​​of remainder to 2 girls to share equally. If each girl received ²/₃​​​​​​ of what each boy had received, how many boys were there?

Comments

"She gave 18 stickers who each boy", 这段有什么字漏掉的吗？

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改了

Answer 1

Auntie Ann distributed 108 stickers to some children.She gave 18 stickers to each boy and 2/3 ​​​​​of remainder to 2 girls to share equally. If each girl received 2/3​​​​​​ of what each boy had received, how many boys were there?

题目是：

Auntie Ann 把108张贴纸分给小孩。每个男孩获得18张贴纸，她再把剩下的 2/3 让两个女孩平分。如果每个女孩获得男孩所获得的贴纸的 2/3，那么总共有多少个男孩获得贴纸？

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首先可以直接算出每个女孩获得多少张贴纸

Number of sticker each girl received 

= 18 x 2/3

= 12

接下来算出有几个男孩

方法 1（代数）

Let number of boy = x

108 - 18x = 36

-18x = -72

x = 4

方法2（树图）

So there were 4 boys.

Comments

可以不要以代数的方式解答吗?我的老师还未教完代数，我还不太理解

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2/3 ​​​​​of remainder to 2 girls是什么剩下的

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不用代数的话，真的不知道要怎么解。可以拍照一些课本上的相关例子，没用代数是怎么解的吗？其实这题用到的代数也很容易，只是一个 x, 等你以后学到 simultaneous equations 就要同时解 x 和 y.

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2/3 of remainder 就是分18张贴纸给每个男孩后，剩下的 2/3。Auntie Ann 没有把所有贴纸分完。
以上就是 (108 - 18x) x 2/3 怎样得来的原理。

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课本的例子就直接给答案算式罢了。老师教类似的题是用树图来教

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成功画到树图了。你看看。

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ok非常谢谢您，我已经明白了