Get skill-building math practice PLUS a calculator, all in one unit that really makes math easy and fun. MathShark randomly or sequentially drills essential math skills including addition, subtraction, multiplication, division, fractions, decimals, and percents with 8 levels of difficulty for each basic operation. The LCD screen displays problems both horizontally and vertically. Sound can be turned off for silent classroom operation. A perfect skill-enhancing tool for all students from gifted to remedial. Requires two AA batteries (not included).