Peter Gottlieb

Most 2nd and 3rd graders struggle with subtraction problems that require borrowing. Having to strike-through numbers and then stack new numbers above …

Long division need not be the traumatic learning experience for 4th and 5th graders. This app (div2) does all the tedious multiplications and subtract …

Here is an app that can calculate 27 different formulas useful in financial transactions. This latest version of the app has added a numeric keypad (w …