{"product_id":"addition-subtraction-within-1000-back-to-school-mystery-detective-grades-2-4-detective-mystery","title":"Addition \u0026 Subtraction Within 1000 | Back to School Mystery | Grades 2–4 | Detective Mystery","description":"\u003cp\u003eBring excitement to your \u003cstrong\u003eaddition and subtraction within 1,000 math practice\u003c\/strong\u003e with these engaging \u003cstrong\u003eMystery Detective worksheets\u003c\/strong\u003e! Perfect for \u003cstrong\u003eGrade 2\u003c\/strong\u003e, \u003cstrong\u003eGrade 3\u003c\/strong\u003e, and \u003cstrong\u003eGrade 4\u003c\/strong\u003e, this printable resource combines \u003cstrong\u003e3-digit addition and subtraction problems with regrouping\u003c\/strong\u003e in a \u003cstrong\u003efun escape room \/ crack-the-code style game\u003c\/strong\u003e. Students solve equations, eliminate suspects, and reveal the mystery - no locks, apps, or complicated prep required. Ideal for \u003cstrong\u003eback-to-school review\u003c\/strong\u003e, \u003cstrong\u003eend-of-year activities\u003c\/strong\u003e, \u003cstrong\u003emath centers\u003c\/strong\u003e, \u003cstrong\u003emorning work\u003c\/strong\u003e, or \u003cstrong\u003etest prep\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eEach of the \u003cstrong\u003efive unique mystery cases\u003c\/strong\u003e focuses on \u003cstrong\u003eaddition only, subtraction only, or mixed addition\/subtraction\u003c\/strong\u003e, giving you flexibility to target specific skills or spiral review. Every set features \u003cstrong\u003estacked vertical equations\u003c\/strong\u003e, a \u003cstrong\u003erandomized answer list with one decoy number\u003c\/strong\u003e for self-checking, and a short detective story to hook your students from the start.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e5 themed Mystery Detective cases:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e1. \u003cstrong\u003eThe Missing Desk\u003c\/strong\u003e - Addition 2. \u003cstrong\u003eWho Stole the School Supplies?\u003c\/strong\u003e - Addition 3. \u003cstrong\u003eThe Vanished Permission Slips\u003c\/strong\u003e - Subtraction 4. \u003cstrong\u003eThe Missing Lab Goggles\u003c\/strong\u003e - Subtraction 5. \u003cstrong\u003eThe Stolen Sports Equipment\u003c\/strong\u003e - Mixed Addition \u0026amp; Subtraction\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEach case includes:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eA unique, engaging \u003cstrong\u003edetective storyline\u003c\/strong\u003e connected to the theme\u003c\/li\u003e\n  \u003cli\u003eA \u003cstrong\u003emix of vertical 3-digit addition and subtraction problems\u003c\/strong\u003e with answers always under 1,000\u003c\/li\u003e\n  \u003cli\u003eA \u003cstrong\u003erandomized answer list\u003c\/strong\u003e with one extra decoy to boost critical thinking\u003c\/li\u003e\n  \u003cli\u003eA \u003cstrong\u003esuspect list\u003c\/strong\u003e for students to eliminate as they solve each problem\u003c\/li\u003e\n  \u003cli\u003eTeacher-friendly directions and complete answer keys\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow-ink, easy-to-print pages\u003c\/strong\u003e for quick prep and flexible classroom use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love This Resource:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMakes \u003cstrong\u003emath fact fluency practice\u003c\/strong\u003e exciting and interactive\u003c\/li\u003e\n  \u003cli\u003eCombines \u003cstrong\u003eproblem-solving, logic, and critical thinking\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003ePerfect for \u003cstrong\u003eindependent work, partner activities, or small groups\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eWorks for \u003cstrong\u003eback-to-school, midyear practice, and end-of-year review\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eAligned with \u003cstrong\u003eCCSS 2.NBT.B.7, 3.NBT.A.2\u003c\/strong\u003e, \u003cstrong\u003eTexas TEKS\u003c\/strong\u003e, and \u003cstrong\u003eVirginia SOL math standards\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMystery Detective cases\u003c\/strong\u003e are an \u003cstrong\u003eindependent escape room (or crack-the-code)\u003c\/strong\u003e type of activity where students solve puzzles instead of unlocking locks. 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