This video describes how to organize the digits of a number within the base ten place value system. The examples provided demonstrate how each place is ten times the value of the place to the right. 

This video explains the values of decimal numbers by describing the relationship between the whole and the part of the whole. The examples provided model this concept using place value charts, number lines and base ten blocks. 

This video describes how to add decimal numbers. The examples include estimating values using whole numbers and various strategies to add decimal numbers. 

This video describes how to multiply decimal numbers by whole numbers. The examples include estimating values and various strategies to multiply decimal numbers by whole numbers. 

This video describes how to divide decimal numbers by tenths. The examples include estimating values various strategies to divide decimal numbers by tenths.