This digital activity includes 12 adding rational numbers problems. Positive and negative decimals, fractions with like and unlike denominators, and mixed numbers are included. NO PREP is required - activity is ready to share with students as-is! This activity is self checking; students are able to receive immediate feedback. Incorrect answers turn the answer box red, while correct answers turn green and fill in the image. Teachers can easily see how far students have progressed, as well as prob