Fractions Flashcards
What is a Fraction?
Fractions show parts of whole numbers.
What are equivalent fractions?
Fractions that are worth exactly the same, even though they are written differently. e.g. 1/4 = 2/8
How do you make equivalent fractions?
You multiply the numerator and denominator by the same number.
How can you compare the size of fractions?
You can find equivalent fractions that have the same denominator as each other, and then compare the numerators, or you can convert the fractions into decimals.
How do you convert a mixed number to an improper fraction?
If you have a mixed fraction a b/c the improper fraction will be (ac + b) / c.
How do you or subtract two fractions?
You have to find equivalent fractions that all have the same denominator. You then add or subtract the numerators, put them over the denominator and simplify the fraction.
a/b + c/b = (a+c)/b
a/b - c/b = (a-c)/b
How do you multiply two fractions together?
a/b x c/d = ac/bd
How do you divide two fractions?
(a/b) / (c/d) = ad/cb
How do you find a fraction of an amount?
You simply multiply the fraction by the amount.