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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.

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."

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.

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

Two numbers with a product of 1 are called reciprocals. If you have a number and want to find the reciprocal of it, simply divide 1 by the number. For example, the reciprocal of 5 is 1/5, and the reciprocal of 700 is 1/700.

Related questions

What does reciprocal mean in fractions

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

The multiplicative inverSe

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:

Reflect.

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..