Two-digit Subtraction : QR CODE Task Cards contains 32 task cards.
Each task card has a subtraction problem and students can solve these problems using 2 answer sheets and then scanning the QR code to check their answer.
This product is appropriate for reviewing and reinforcing two-digit subtraction.
Most Smartphones will have a bar code scanner as an app which will read QR codes.For the desktop you can also install a little bit of software that will use a webcam to read the codes.
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