Numbers can be added together using the column method. This involves writing one number underneath the other. If the two numbers in a place value column add up to a number greater than 9, you must ...

NARRATION: Back in the deepest, darkest depths of time, there lived a great mathemagician called Hypatia. Numbers fell under her spell one by one. With them, Hypatia could do anything. Now, Hypatia is ...