This is a great workmat for your students to practice changing 6-digit numbers (up to the hundred thousands place) from expanded form to standard form. This activity is tricky because some of the numbers have 0's in them. Many times students don't know how to put 0 as a placeholder so this gives them an opportunity to practice this. Each problem has a QR code to self-check. Each problem also has a place value chart to help students make sure they put each digit in the correct place.