Fractions Review

Fractions A number in the form Numerator Denominator Or N D

Multiplication Multiply the numerators and put in the numerator of the result Multiply the denominators and put in the denominator of the result 89 8 x x 428 == x

Multiplication - Let’s Try It! = x = x = x = x

Simplification - Let’s Try It! = = = = 21 7 = 15 6 =

Division Just like multiplication with one more step Invert the second fraction and multiply = ÷ x = 8 6

Division - Let’s Try It! =÷ = ÷ =÷ = ÷

Addition To add two fractions, you must make sure they have a Common Denominator What is a Common Denominator?

Addition - Let’s Try It! =+ = =+ =

Subtraction To subtract two fractions, they also must have a Common Denominator What can you multiply each fraction by to give the smallest common denominator? The smallest number that has both of these as factors is 16 8 goes into 16 two times 16 goes into 16 one time 16 6 = x 5 = x = 1 Once you have a common denominator, subtract the numerators.

Subtraction - Let’s Try It! = = - = =

12 To express a mixed number as an improper fraction, first multiply the whole number by the denominator and add the numerator. Then write this sum over the denominator.

13 = 2 x = 2 2

14 To express an improper fraction as a mixed number, divide the denominator into the numerator.

15 =