Question

طرفین وسطین که تو ریاضی داشتیم چی میشه به انگلیسی ؟

 

Answer 1

To cross multiply 

Comments

thanks

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Butterfly

Answer 2

Both "cross multiplication" and "butterfly method" are valid terms used to describe a method of multiplying fractions.

The "cross multiplication" method involves multiplying the numerator of one fraction by the denominator of the other, and vice versa. This is also sometimes called the "cross product" method.

The "butterfly method" is another term for the same process, named for the way the method looks when the fractions are written out in a specific format. This method is sometimes used in elementary schools to help students visualize the process of multiplying fractions.

Both terms are widely used and recognized, so either one can be used to describe this method of multiplying fractions.

Comments

Boy, is the first paragraph of this description misleading! And there I was, thinking I must have never learned my fractions fully!

 

For those who, like me, are prone to take what they read literally, here it goes: The butterfly method is NOT, I repeat, is NOT, "a method of multiplying fractions", as the description says. There is only one method of multiplying fractions: you myltiply the numerators, put the result in the numerator on the other side of the equal sign, then multiply the two denominators  and write that outcome in the denominator of the resulting fraction on the other side of the equal sign. That's all, that is how you multiply fractions, always.

The butterfly method, on the other hand, is just an easy way to raise two fractions to an equalized, comparable state such that their values may be compared to see if the two fractions are equal to each other or, if they are not, to determine which one is bigger.

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What do you mean by "the description"? If you're referring to my answer, I think it wasn't misleading, and you've actually made it a bit confusing.

If your answer is to suggest cross-multiplication and the butterfly method are two separate things, I'm sorry to say they're not.

Probably needless to say, but: Cross-multiplication ≠ Multiplying fractions

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I AM referring to your answer. You say above:

Probably needless to say, but: Cross-multiplication ≠ Multiplying fractions

This is true enough. However, this is not what the original answer provided by you suggests. As proof, please see below a copy of the first paragraph of your original answer.

Both "cross multiplication" and "butterfly method" are valid terms used to describe a method of multiplying fractions.

The description explicitly refers to cross-multiplication as "a method of multiplying fractions". This is why I am saying it is misleading.