Addition and Subtraction Logic Puzzles for January and Winter. Perfect for practicing adding and subtracting groups of 10, place value, missing addends. These winter-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-level (or two) above 1st grade and the ones who sometimes struggle to show growth on D