Bathematics

Addition
One bath tub plus two bath tubs equals three bath tubs!

Fractions
One bath tub is 1/2 filled with water and another bath tub is 1/4 filled with water. There is 3/4 of a tub of water all together!

Subtraction
Six bubbles from bubble soap addd into a bath tub floated into the air. Three bubbles popped. There are four bubbles left!

Variables
FLUUBEE BURGERS!