{"product_id":"addition-subtraction-csi-math-mystery-worksheets-grades-3-5-haunted-halloween","title":"Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 3–5 | Haunted Halloween","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eDisguise addition and subtraction review as a haunted Halloween case your students will race to crack. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with addition and subtraction and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Making 100, addition and subtraction with 10 more\/10 less and 100 more\/100 less, subtraction from 100, and coordinates (one quadrant)\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Halloween, math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA haunted Jack O' Lantern has caused chaos this Halloween, and a list of suspects is all your students have to go on. Only the sharpest math detectives can unmask the villain.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve addition and subtraction clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and unmask the villain? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaking 100 with addition\u003c\/li\u003e\n  \u003cli\u003e10 more \/ 10 less and 100 more \/ 100 less addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eSubtracting a single digit from a double digit\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 100\u003c\/li\u003e\n  \u003cli\u003eReading coordinates on one quadrant\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Halloween addition and subtraction activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eAddition, subtraction, and coordinate clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAddition and subtraction review\u003c\/li\u003e\n  \u003cli\u003eHalloween and October math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951262720370,"sku":"4074188","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/addition-subtraction-csi-math-mystery-haunted-jack-o-lantern-grades-3-5.jpg?v=1781748260","url":"https:\/\/kiwilandeducation.com\/products\/addition-subtraction-csi-math-mystery-worksheets-grades-3-5-haunted-halloween","provider":"Kiwiland Education","version":"1.0","type":"link"}