Crack the Code Math Worksheets – Addition & Subtraction (Up to 40) , and subtraction (up to 20) | Summer Theme | For Grade 1 Description:Make math fun with this Crack the Code activity set! This 20-page PDF , Paper size 8. 5 * 11 inches ,worksheet collection is designed for first-grade students, focusing on addition (up to 40) and subtraction (up to 20). Each page includes a fun summer-themed mystery code that students can solve by answering math problems correctly. What’s Included:✅ 2