Khan Academy
Rounding Whole Numbers 3
Sal Khan completes the 3-part rounding series with this Khan Academy video on rounding to the nearest 10. He references the actions taken in video 2, so students would be best served if all three videos where shown in sequence.
Curated OER
What is Place Value?
The teacher names and explains place value. She starts at the ones and moving left of the decimal goes to a million. Then moving right of the decimal she names and explains tenths to thousandths.
Khan Academy
Writing a Number in Expanded Form
Understanding place value is a basic mathematics skill. This Khan Academy video shows students how to write the number 14,897 in the expanded form. He explains that the 7 in the ones place is the same as 7x1, the 9 in the tens place is...