Place Value is a system that groups numbers based on there size.
The postion of a digit determins its value. When we say numbers we group them with in the same house. For example 15, 709 has Fifften thousands, Seven hundreds and Nine ones.
Understanding our base 10 place value system allows us to pronounce big numbers properly. It also qllows us to identify numbers before and after.
LI: to read numbers larger than 999.
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