After watching the lesson video, let's see what you know about changing numbers. 1) Label the columns in your place value chart. 2) Write down a 7-digit number. 3) Add shapes or drawing to the chart to represent that number. 4) Name the number by saying it. 5) Add commas to your place value chart. 6t) What happens to the number when you add and take away parts of it? Can you represent that in an equation? Explain your thinking.