An elementary school-level place value chart typically features a grid with each place labeled according to the value it represents. This grid helps children grasp the relationships between the different digits in numbers by adding them. Charts can be colored to make them easier to read.
Counting is done in the base 10 system in which each place value represents a power of 10. For example, the number 349 combines 300, 40 and 9. From the right, it starts with the 1s digit, then the 10s, then 100s. More advanced place value charts include 1000s, millions, billions or go into decimal places such tenths and hundredths.