{"product_id":"addition-subtraction-within-1000-back-to-school-math-mystery-grades-2-4-detective-mystery","title":"Addition \u0026 Subtraction Within 1000 | Back to School Math Mystery | Grades 2–4 | Detective Mystery","description":"\u003cp\u003e\u003cstrong\u003eAddition and subtraction within 1000 turns into a case worth cracking when a desk vanishes from the classroom, the safety goggles disappear from the science lab, and the whole box of field-trip permission slips is stolen.\u003c\/strong\u003e In this no-prep, printable back-to-school \u003cstrong\u003eMath Mystery\u003c\/strong\u003e, students work as private detectives who solve \u003cstrong\u003e3-digit addition and subtraction\u003c\/strong\u003e problems, match each answer to a clue, and eliminate suspects until the culprit is caught. The self-checking, story-driven format builds real 3-digit addition and subtraction fluency while easing 2nd, 3rd, and 4th graders into the school year — perfect for the first weeks back, math centers, morning work, homework, early finishers, substitute\/relief days, indoor recess, and spiral review.\u003c\/p\u003e\u003ch3\u003eQuick Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkill:\u003c\/strong\u003e Addition and subtraction within 1000 (3-digit, with regrouping)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrades:\u003c\/strong\u003e 2–4 (2nd, 3rd, 4th)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e 5 no-prep printable mystery worksheets + suspect lists + full answer keys (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTheme:\u003c\/strong\u003e Back-to-School \/ classroom detective mystery\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe 5 Mysteries\u003c\/h3\u003e\u003cp\u003eEach case pairs a worksheet with a suspect line-up: students solve the problems, match answers to clues, and cross off suspects until one is left:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase One: The Missing School Desk\u003c\/strong\u003e — A desk has mysteriously vanished from your classroom. Add to work out which suspect took it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Two: The School Supplies\u003c\/strong\u003e — A box of school supplies has gone missing from the supply cupboard. Solve the problems to name the thief.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Three: Field Trip Permission Slips\u003c\/strong\u003e — A thief has stolen all the field-trip permission slips from the office. Subtract your way through the clues to find who did it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Four: Safety Goggles\u003c\/strong\u003e — Someone has swiped all the safety goggles from the science lab. Work out who the culprit is.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Five: School Sports Gear\u003c\/strong\u003e — During the big game, the school's sports gear has vanished from the storage room. Solve the problems to reveal who took it.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Teachers Love It\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero prep\u003c\/strong\u003e — just print and hand out; every case is a single self-contained page.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-checking\u003c\/strong\u003e — the suspect-elimination format means students catch their own mistakes and stay accountable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngagement that lasts\u003c\/strong\u003e — the detective story pulls in even reluctant and struggling students.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferentiation-friendly\u003c\/strong\u003e — assign one case at a time or the full set; ideal for mixed-ability classrooms.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSkills Covered\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdding and subtracting within 1000 (3-digit numbers)\u003c\/li\u003e\n\u003cli\u003eRegrouping \/ carrying and borrowing across place values\u003c\/li\u003e\n\u003cli\u003eComputational accuracy and fluency\u003c\/li\u003e\n\u003cli\u003eLogical reasoning and deductive process of elimination\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5 print-and-go mystery worksheets (one per case)\u003c\/li\u003e\n\u003cli\u003eMatching suspect line-up lists\u003c\/li\u003e\n\u003cli\u003eFull answer keys for every case\u003c\/li\u003e\n\u003cli\u003eStudent detective instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest Used For\u003c\/h3\u003e\u003cp\u003eBack-to-school and first-weeks activities, math centers, independent practice, morning work, homework, early finishers, substitute\/relief days, indoor recess, and spiral review — any time you want addition and subtraction within 1000 practice that feels like a game.\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62005444280690,"sku":"14187470","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/addition-subtraction-within-1000-back-to-school-math-mystery-detective-cover.jpg?v=1783219562","url":"https:\/\/kiwilandeducation.com\/products\/addition-subtraction-within-1000-back-to-school-math-mystery-grades-2-4-detective-mystery","provider":"Kiwiland Education","version":"1.0","type":"link"}