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Grade 4: 等值分数

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数学

北美数学的学习在思维和逻辑方式上有许多不同,同时,刚来留学的同学可能也对很多数学的专有名词感到困惑。需要在北美地区学好数学,首先要对英文的数学名词有更好的了解,并锻炼数学逻辑。

 

今天,我们就来讲解一下北美小学四年级的一道经典数学题。

 

等值分数 

Equivalent Fractions

 

Below is a question a typical grade 4 student would receive on a math exam. The question is for students of an average ability level.

 

Which missing value makes these fractions equal?

To answer this question, students must be aware of what each part of the fraction means. The numerator determines the number of parts and the denominator displays the total number of parts.

 

With fractions questions visualization is very beneficial to students.

 

Here is a grid broken into 16 parts where 4 are highlighted.

Now we take the same grid however we only split it into 8 parts.

From here we can tell, if we want to keep the same amount of area shaded as the original, we only need to color 2 blocks.

 

Once students are aware of this, they find it easier to see why we use division and multiplication to find equivalent fractions, and it becomes much easier to teach them to perform the same operation on the top and bottom of a fraction to keep the fraction in the same proportion.

 

 

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