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A reciprocal is useful to know in math because to divide fractions, you must multiply by the second fraction's reciprocal. For example:

2/3 divided by 4/7

is the same as

2/3 times 7/4.

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Q: Why is it useful to know what a reciprocal is in math?

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A reciprocal is 1 divided by a number. So, the reciprocal of x is 1/x. For example: The reciprocal of 2 is 1/2 is 0.5 The reciprocal of 9 is 1/9 is 0.111111111111 The reciprocal of 0.5 is 1/0.5 is 2. To divide one by a number is called 'taking the reciprocal.' If you have a fraction, taking the reciprocal is fairly easy: simply 'flip' it. I.e., put the numerator in the denominator, and the denominator in the numerator. For example: The reciprocal of 2/3 is 3/2 The reciprocal of 7/8 is 8/7 The reciprocal of 1/4 is 4 (/1). The technical mathematical definition of the reciprocal of x is: "The number which, when multiplied by x, gives one."

Mathematics are useful in everyday life. It can help you do your "math" homework, and do your math test/ exams.

The reciprocal of any non-zero number is one divided by that number. The reciprocal of 0 is not defined. For example, if R(x) represents the reciprocal of x, then R(6) = 1/6 R(5/7) = 1 / (5/7) = 1*(7/5) = 7/5 R(x) = 1/x

Either it is an expression yelled by a teacher when something goes wrong, or it is an alternative term for "to find the reciprocal of". For example, the reciprocal of 3/4 is equal to 4/3 - you have "flipped" the fraction around.

co'z it can be in what ever job math is useful beco'z its can fell ur mind fresh

Related questions

What does reciprocal mean in fractions

-My teacher likes for us to use math terms, such as reciprocal, in class.

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1/a is the reciprocal of a

Interest and percent I know. Proportions are useful for finding that.

Flip is the technical term for a reciprocal. (The reciprocal of 3/4 is 4/3)

Math is very useful. You may not realize it but you are always using math. From counting how many eggs to cook or paying for something you'll always need it. I personally don't love math but i know it will be extremely useful in my future.

Math sucks c:

yes, math is useful. But you probably won't need higher then 1st year calc

The reciprocal is the "multiplicative inverse". This means 1 divided by the number. The reciprocal of 2 is 1/2, the reciprocal of 5 is 1/5, etc.

The reciprocal of a number is: 1 divided by the number. Example: the reciprocal of 2 is 1/2 and 5 is 1/5..

A reciprocal is when you take the second fraction in a division problem and flip it Then change the sign to multiply. THIS ONLY WORKS WHEN YOU ARE DIVIDING FRACTIONS!

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