Yes.
no
210
Common denominators.
They have to have a common denominator
154
You need a common denominator for both.
No only when adding or subtracting fractions a common denominator is needed
Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.
A Common Denominator
Yes.
Yes.
When adding or subtacting fractions make sure that the denominators are of the same values if they are not then find the lowest common denominator.