A:
One of the simplest ways to teach children the concept of decimals is to work with money, which is based on the decimal system. The dollar should represent the whole number, whereas different coins represent parts of the whole: a quarter is 0.25, a dime is 0.1, a nickel is 0.05, and a penny is 0.01. This illustrates the basic idea of decimal numbers as parts of a whole. It's also important to teach children how to work with decimals.