Do you have iPads or iPods in your classroom? If so, you can use QR codes! My class loves using QR codes and so do I! Each task card has a double digit subtraction problem with a QR code. The recording sheet provides students space to show their work and write their answer. There are two types of recording sheets. There is also an "Explain Your Thinking Page" that allows your students to explain how they solved their problem. An answer key is included. Color and black and white version. Please let me know if you have questions!