Flip 4 Math provides a simple but fun way to review or learn math. This app provides limitless flip cards for viewing. Slide your finger across the screen to view the answer of a problem or to see a new problem. Drag your finger down the screen to adjust the settings. Set the options to allow addition, subtraction, multiplication, or division. Also it is possible to allow or disallow negative numbers through subtraction. Division can be either whole number problems or decimal solutions rounded to three decimals.