Which monster stole all your socks from your closet?! Add and subtract decimals this halloween season to find out. Includes: Monster Mugshots Your mission Organized workspace Crack the code page with addition and subtraction through the thousandths Fill in the blanks using the code to solve the mystery Differentiated version (pre aligned decimals) Answer Key Check out my other fun math mystery St. Patrick's Day 5th grade Fraction Challenge: Leprechaun LineupSt. Patrick's Day 5th and 6th grade F