QR CODE Addition and Subtraction Task Cards contains 16 task cards.Each task card has a subtraction or addition problem and students can solve these problems using answer sheet and then scanning the QR code to check their answer.
This resource is appropriate for reviewing and reinforcing addition and subtraction.
Note :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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FREE QR CODE Addition and Subtraction Task Cards is a sample from these products: