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Place Value and Rounding

Place Value 1http://youtu.be/vKc61vhFMyU
Explains place values for whole numbers, base ten, powers of ten, expanded form of a number, state place value of number.

Shows how to write a number in words, and how to write from words to a number.

Rounding Whole Numbershttp://youtu.be/vNsmn4SMD4k
Shows how to round whole numbers to a certain place value.