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Q: What do you when your subtracting fractions with unlike denominators and when you subtract your numerator is zero?

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You multiply the fractions until the denominators are equal. Then, you subtract.

If the denominators are the same, subtract the numerators. If the denominators are different, convert them to equivalent fractions with a common denominator and subtract the numerators.

you subtract the numerator but the denominator stays the same.

To add and subtract fractions, you need common denominators. To find the common denominator, take the LCM of the denominators you wish to add or subtract.

To subtract fractions with like denominators, subtract the numerators , and write the difference over the denominator. Example : Find 45−25 . Since the denominators are the same, subtract the numerators.

You cannot add or subtract fractions with different denominators. If the denominators are different then you need to work with equivalent fractions.

To add and subtract fractions, you need common denominators. To find the common denominator, find the LCM of the denominators you wish to add or subtract.

because you subtract the 2 numerators and then 2 denominators right across just like that :)

Whether the numerators are the same or not, you need to get the denominators to be the same. First, find the least common denominator. Then convert the fractions to equal fractions that use the common denominator. Then you can subtract the fractions by subtracting the numerators. Finally, look for common factors between the numerator and the denominator of the difference in order to put the answer in simplest terms.

The numerator of the answer is the result of subtracting the numerators of the fractions, and the denominator of the fraction is the same as the common denominator.

It's the same thing as adding or subtracting normal fractions - just make sure both fractions have the same denominators (by either multiplying the denominators or simplifying the fraction - whichever the question needs).

If the denominators are the same (which is what I understand by "similar fractions"), just subtract the numerators (the upper part).

multiply the fractions until they have common denominators and then subtract them

It means you have to subtract fractions.

subtracting fractions

Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.

You have to get common denominators and then subtract the biggest numerator (top number) by the smallest, you may have to cnacel the fraction down to get the smallest possible fraction

When you add or subtract fractions with like denominators, you just add or subtract the numerators and put them over the same denominator. For example, 3/5 - 2/5 = (3 - 2)/5 = 1/5

If the fractions have the same denominator, add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible. If the fractions have different denominators, find the LCM of the denominators and convert the fractions to equivalent fractions with like denominators. Then add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible.

No. If the denominators are the same, you subtract the numerators. If the denominators are different you have to find the least common denominator.

Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.

by finding the common denominator of the fractions

2/6

Because to add fractions, the denominators must be equal.

you subtract the numerators, and leeave the denomonators alone