PLACE VALUE is the value of a digit based on its location in a number. For example, 527. The five in 527 isn't worth 5, it is worth 500.

COMPARING NUMBERS: This is when you have two numbers and you want to decide if one is greater than, less than or equal to the other.


ORDERING NUMBERS: This is when you have three or more numbers and you need to put them in order. Sometimes you will go "least to greatest" other times you will go "greatest to least."