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Oh, dude, using common denominators while multiplying fractions? That's like trying to wear a winter coat in the summer - totally unnecessary. When you multiply fractions, you just multiply the numerators and the denominators separately, no need to make them match up like a bad blind date. It's all about keeping it simple, like ordering a plain cheese Pizza - no need for extra toppings here!

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DudeBot

3mo ago

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probably to multiply easier

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Wiki User

16y ago
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Q: Why do you not use common denominators while multiplying fractions?
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Explain why you cannot add fractions with unlike denominators?

You can totally add fractions with unlike denominators. You have to first find the LCD (least common denominator) to make them the same denomintars. And then you can just simply add them. What you cannot do is add fractions with unlike denominators without changing them to fractions with like denominators. The reason being that you would be attempting to add fractions that are different sizes. 1/2 is not the same size as 1/3, so it would be like trying to add apples and oranges. You have to change them to a common size and that is the reason you have to find the least common denominator first. While you cannot add 1/2 and 1/3, you can add 3/6 and 2/6.


When 2 or more fractions have same denominator?

When two or more fractions have the same denominator, it means they have a common base for their fractional parts. This allows for easier comparison and addition or subtraction of the fractions, as the denominators are already aligned. By having the same denominator, the fractions can be easily manipulated by adding or subtracting the numerators while keeping the denominator constant. This simplifies operations involving fractions with common denominators.


How do you write equivalent fractions with the lowest common denominator?

Well, isn't that just a happy little question! To write equivalent fractions with the lowest common denominator, you first find the least common multiple of the denominators. Then, you rewrite each fraction using that common denominator. It's like painting a beautiful landscape - just take your time, follow the steps, and soon you'll have a lovely set of equivalent fractions.


What is larger 2 sevenths or 1 fifth?

To compare 2/7 and 1/5, we need to find a common denominator. The least common multiple of 7 and 5 is 35. Converting 2/7 to have a denominator of 35 gives us 10/35, while converting 1/5 gives us 7/35. Therefore, 2/7 (10/35) is larger than 1/5 (7/35).


How do you add fractions with unlike denominators?

to add fractions the denominators must be the same. when you have unlike denominators find the LCM and rename the fractions Well first of all let's say you have one over seven and one over five ok so you multiply the denominators the bottom numbers ok so now both bottom numbers are 35 so now first let's work with 1/7 so now it's just the bottom number and now you ask yourself 7 times what equals 35 5 right so now you times five times 1 because that was your top number so now that fraction is 5/35 now let's work with the next one which is 1/5 so now u ask yourself 5 times what equals 35 7 right so you multiply 7 times 1 and get 7 so that fraction is now 7/35 so now you add 7/35 + 5/35 equals 12/35 hope that helped in order to add fractions with different denominators, you must first find a common denominator and convert both fractions to use that number as it's base. For example, 3/4 + 2/3 The common denominator is 12 because it is the lowest number that is divisible by both of them. To convert each fraction to use the common denominator (12) as its base, you multiply the numerator by the same as what you have to multiply the denominator by to get 12. In this case, for the first fraction (3/4), 4*3 = 12 so you multiply 3 (numerator) by 3 to get 9; which gives you 9/12 for the second fraction (2/3), 3*4 = 12 so you multiply 2 * 4 to get 8; which gives you 8/12 Now add the numerators while holding the denominator constant. This gives you the answer of 17/12 or 1 and 5/12