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When A/B is divided by C/D, just flip C/D into D/C and multiply. Outcome should be AD/BC.
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How do you add frcations with uncommon deniminator?
No. you must make the denominators the same
How do you divide fractions with un common denominators?
When dividing fractions, the denominators don't matter. Multiply the first fraction by the reciprocal of the second.
How do you find common denominators with dividing fractions?
When you're dividing fractions ... or multiplying thrm ... they don't need to have the same denominator.
How do you multiply fractions with uncommon denominators?
To multiply fractions all you do is multiply the numerators and the denominators separately eg: 4/7 x 6/11 = 24/77. The "commonality" of denominators has no relevance.
Can you multiply fractions that have a different demonminator?
Yes. When multiplying and dividing fractions your denominators do not have to be the same. The denominators only haveto be the same if you are subtracting or adding them.
When dividing fractions do need a common denominator?
No. Common denominators are needed for addition and subtraction, not multiplication or division.
How do you change fractions into desimals?
You change fractions into decimals by dividing their denominators into their numerators as for example 3/4 = 0.75
Are the steps for like and unlike denominators the same or different?
It depends what you are doing with the fractions. If you are multiplying or dividing fraction, the denominators do not need to be the same and the calculation can be carried out immediately. If you are adding or subtracting fractions, the denominators must be the same; if you have different denominators, the fractions must first be changed into equivalent fractions with the same denominator. When the denominators are the same (or have been made the same as equivalent fractions from being different) the calculation can be carried out.
Do you have to change the denominators when multiplying fractions?
No. To multiple fractions multiple the numerators together and multiply the denominators together and simplify (by dividing both numerator and denominator of the result by common factors until the only common factor is 1). The denominators only need to be the same when adding or subtracting fractions.
Do you need same common denominators when dividing fractions?
Commun denominators are the same no matter what your doing with them. However you don't need a common denominator to decide fractions. Flip one of them upside-down (2/3 into 3/2) then multiply them. It works, no joke.
What is the sum of negative 2 over 7 plus 7 over 9?
The SUM is 31over63. When adding two fractions with uncommon denominators you give them a common denominator by multiplying the denominators. Then multiply the numerators by which their denominator was multiplied. This keeps the problem balanced. You would then have -18over63 plus 49over63. -18 plus 49 equals 31, giving you 31over63. If you needed to divide negative 2 over 7 by 7 over 9, the answer would be -18/49 because you 'keep' the first fraction, 'change' the function to multiplication, and 'flip' the second fraction when dividing fractions.
Why do you need a common denominator when you add fractions?
Unless you are using a calculator that adds them for you, it is much harder to add fractions with uncommon denominators. Having the same denominator allows you to only have to add the numerators for your answer.
