Because to add fractions, the denominators must be equal.
The denominators need to be the same for subtraction. Find the Least Common Denominator for both items and then subtract.
unlike fractions
unlike fractions
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators.
Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.
Because to add fractions, the denominators must be equal.
The denominators need to be the same for subtraction. Find the Least Common Denominator for both items and then subtract.
unlike fractions
unlike fractions
The question is based on a complete misunderstanding of what is required. Unlike denominators are NOT required!
multiply the fractions until they have common denominators and then subtract them
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.
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.
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.
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.
No. If the denominators are the same, you subtract the numerators. If the denominators are different you have to find the least common denominator.