Operations with Rational Numbers

Any number that can be written in the form, where m and n are integers and n 0, is called a rational number In other words, fractions….

Fractions are used when we need to identify part of a whole.

To combine Rational Numbers, you must have a … COMMON DENOMINATOR

The LCD is the smallest number that all the denominators divide into evenly. 2 and 3 Think of the LCD for the following pairs of numbers LCD = 6 3 and 4LCD = 12 2 and 7LCD = 14 3 and 6LCD = 6

For example: = X X 3 = 7 12

For example: = X X 3 = 13 15

For example: = X X 2 = 1 10

For example: = X X 4 = 23 20

Multiplying and Dividing Rational Numbers

To multiply Rational Numbers, multiply corresponding numerators and denominators For example: = 12 35

= = 2 9

For division: Flip the second RN and Multiply =? = 14

= = 35 8

See Sheets