When applied to panoramic images, an extended subtraction method is helpful in monitoring changes around dental implants, according to a new study in Clinical Oral Implants Research (June 2, 2011).

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 ...

The common-core math standards require that students learn the standard algorithm for multi-digit adding and subtracting—you know, the process in which you line the numbers up vertically to add or ...