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Let's do an example:
5/6 - 3/4 = ?
To find this you must first get both fractions to have the same denominator, or the number on the bottom. This is accomplished my cross multiplication. Multiply the bottom number of the second fraction by the top number of the first; likewise with the other set.
5 x 4=20 and 6x3=18
Now multiply the two bottom numbers by each other.
6 x 4 = 24
This number will be the new denominator.
20/24 - 18/24 = ?
Now subtract like normal!
= 2/24 = 1/12
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Do you add and subtract like and unlike fractions in the same way?
no, to add and subtract like and unlike fractions the denominator has to be the same,
When do you use LCM in math?
When you want to add or subtract unlike fractions.
How do you add and subtract dissimilar fractions?
Make the fractions equivalent then subtract
How do you add or subtract fractions with unlike denominators?
convert at least one of them so that they have the same denominator, then proceed with the addition or subtraction
How do you add two fractions that have like denominators?
In fractions, you can NEVER add or subtract
