Are you looking for a fun hands-on Halloween-themed activity for one-step and two-step addition and subtraction word problems for your 4th graders? With these engaging math mystery message task cards, students will practice targeted math skills by answering these math word problems and decoding the secret message! This quiz alternative will appeal to all students, including homeschool, general ed, and gifted and talented students. In this PDF, you will get 24 task cards. 24 unique task cards