It will help you to get the right answer. Just by looking at it, what do you think 1/2 + 1/3 is? If you realize that 1/2 is equal to 3/6 and 1/3 is equal to 2/6, then 5/6 is the obvious correct answer.
yes you should use a common denominator when subtracting with fractions, it makes it much easier.
A common denominator is needed when adding or subtracting fractions of different denominators.
Yes.
It is the lowest common multiple of the different denominators.
No, You only need a common denominator when adding or subtracting fractions.
Same as for addition. Mainly, you have to convert the fractions to equivalent fractions that have the same denominator. After that, it is easy: just subtract the numerators and put the result on top of the common denominator.
No only when adding or subtracting fractions a common denominator is needed
Yes.
A Common Denominator
only when adding and subtracting
a common denominator
Yes.