Adding and subtracting double-digit numbers (with regrouping) within 102 for the end of the year and Summer. Perfect for practicing students' understandings of addition, subtraction, missing addends, making a 10, and commutative property. These Summer-themed puzzlers are ideal for math enrichment and challenge! So often it seems that finding just-right resources for all of our learners is a full time job, especially for our highest group of mathematicians. These are the friends working a grade-l