Because if there's no common denominator it'll be hard to simplify. And will cause you to get a headache.
They have to have the same denominator.
I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
If their denominators are different then find their lowest common denominator by means of their lowest common multiple remembering to adjust their numerators accordingly before adding or subtracting.
Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
First find the lowest common denominator and then adjust the fractions accordingly before subtracting the numerators
They have to have the same denominator.
I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
Because the answers will be wrong when adding or subtracting them if they don't have a common denominator.
If their denominators are different then find their lowest common denominator by means of their lowest common multiple remembering to adjust their numerators accordingly before adding or subtracting.
Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
When adding or subtracting, convert all fractions in the question to a common denominator/ 1/2 + 1/4 - 1/3 = 6/12 + 3/12 - 4/12 = 5/12
First find the lowest common denominator and then adjust the fractions accordingly before subtracting the numerators
you must make the fractions equivalent and with the same denomenator
Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.
Find the lowest common denominator
you gotta find tyhe width of they nile river and substiture into the cosine rule before dividing by the velocity of the amazon rainforest
look at the denominator see if it is the same as the other denominator or see if it is the same number at the bottom of each number.