This product is a great alternative to worksheets and can either be used at a math center for additional practice or in small groups. You can also take up the answer sheet to use as an assessment. Students will add two 2 digit numbers or one 2 digit number plus a 1 digit number. QR codes are fun, engaging, and provide immediate feedback to students They are optional, but make this activity self checking. There are 20 task cards and an answer sheet for students to use to write their answers, and an answer key if you choose not to use the QR codes.