This is a great interactive iPad activity that your students will love! I know mine did! I put these task cards up all over the school and the students had a scavenger hunt to find the QR codes. Then they solved the problem and used the QR code to check their answer. This is a wonderful and fun review of finding values of numbers, locating the place of a number, and putting numbers in expanded, word form, and standard form. There are 28 total task cards in color!