Add and Subtract Decimals Challenge Puzzles are a fun way to challenge your students while they gain a deeper understanding of adding and subtracting decimals. These puzzles are available as a 10 page printable PDF and a 34 slide paperless version made with Google Slides™ for distance learning. Five different types of puzzles are included: square sums, mystery decimal equations, grid logic puzzles, determine the decimals puzzlers, and missing digits puzzles. These 34 different adding and subtra