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Simplicity of calculation

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โˆ™ 2010-04-25 16:06:53
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Q: Why do you change mixed numbers to improper fractions before multiplying and dividing?
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How is multiplying mixed numbers different than multiplying fractions?

if you have mixed numbers you make them into improper fractions before you multiply


Is there a trick to multiplying mixed numbers?

you have to turn them into improper fractions before you multiply them.


How is multiplying rational numbers like multiplying fractions and multiplying decimals?

Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.


When dividing fractions or mixed numbers?

what is dividing fractions and mixed numebers


When multiplying two mixed numbers what do you do first?

First you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)


How is multiplying and dividing rational numbers similar to multiplying and dividing integers?

did you get this off of big ideas learning


How is dividing mixed numbers the same as dividing fractions?

A mixed number can be converted into an improper fraction. Mixed numbers as improper fractions can be divided just like any other fraction. To convert a mixed number to an improper fraction multiply the whole number by the denominator and add the original numerator to give the new numerator and put this over the original denominator.


Why do you think it is helpful to convert mixed numbers into fractions before multiplying or dividing?

So that you can get your answer more faster and you don't need to do a lot of work


How is multiplying and dividing rational numbers similar?

Dividing by a non-zero rational number is the same as multiplying by its reciprocal.


How is dividing mixed numbers like dividing fractions?

you cant divide mixed numbers


How do add mixed improper fraction?

Mixed numbers can be converted to improper fractions. Improper fractions can be added the same way proper fractions are.


Are fractions whole numbers?

No. All fractions are not whole numbers, but all whole numbers are [improper] fractions (with a denominator of 1).


How do you turn a mixed number into a proper fraction?

Mixed numbers cannot be turned into proper fractions, but they can be made into improper fractions by multiplying the integer (# on the side) by the denominator (bottom), and then adding that number to the numerator (top).


Why is multiplying mixed numbers less than dividing mixed numbers with fractions?

It depends on the numbers. For example, dividing by 1 1/2 (one and a half) is exactly the same as dividing by 3/2, since both represent the same number.In general, if you divide by a larger number, the result will be less.


How are all integers and whole numbers are rational numbers?

Because they can be expressed as fractions albeit improper fractions


Do architects use mixed numbers and improper fractions?

no.


How do you times mixed numbers?

turn them into improper fractions


How to multiply mixed numbers?

First change the mixed numbers into improper fractions by multiplying the denominator and the whole number and add the product to the numerator in the mixed numbers and then multiply the numerators and the denominators and divide the numerator by the denominator of the product.


How are improper fractions and mixed numbers different to proper fractions?

In case of Proper fractions the numerator is lesser than the denominator. Whereas in case of improper fractions and mixed fractions the numerator is greater than denominator.


How do you subtract fractions with mixed numbers and like denominators?

Convert them to improper fractions and proceed.


Why do mixed numbers need to be turned into improper fractions?

It helps with adding and multiplying fractions sometimes. Its simpler to multiply 3/7 x 9/7 than 1 2/7 x 3/7.


When multiplying and dividing rational numbers how do you know if you're into me positive negative?

It the signs of the two numbers that you are multiplying or dividing is the same, then the answer is positive, otherwise the answer is negative. Remember though, that division by 0 is not defined.


When do you use multiplying and dividing fractions in the real world?

You may not literally say "multiplied by a half" but multiplying and dividing by fractions are equivalents to doing the other function with an inverse number, most easily in that dividing by 2 is the same as multiplying by (1/2). We don't often multiply and divide by fractions because most of the time we can convert such a problem into a nicer one. We may use fractions like this, for example, in a test out of 90 marks where one must score 2/3 to pass. This pass mark is obtained by multiplying 90 by (2/3), though this, as said earlier, would usually, even unconsciously with such convenient numbers, be split into "divide by 3, then multiply by 2".


How do you convert proper fractions into improper fractions?

You cannot. They are two disjoint subsets of rational numbers.


Why change mixed numbers to improper fractions?

For addition, subtraction, division and multiplication with other fractions

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