Balancing Equations with sums and differences within 20 Logic Puzzles for March. Perfect for practicing balancing equations, adding and subtracting within 20, and finding missing addends/subtrahends. These Spring-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