{"product_id":"2-digit-addition-with-regrouping-back-to-school-math-mystery-grades-1-3-detective-mystery","title":"2-Digit Addition with Regrouping | Back-to-School Math Mystery | Grades 1–3 | Detective Mystery","description":"\u003cp\u003e\u003cstrong\u003e2-digit addition with regrouping is the case to crack in the first week back, when the teacher's lunchbox, a whole teacher, and the classroom art supplies all go missing.\u003c\/strong\u003e In this no-prep, printable back-to-school \u003cstrong\u003eMath Mystery\u003c\/strong\u003e, students become private detectives who solve 2-digit addition with regrouping problems, match each sum to a clue, and eliminate suspects one by one until the culprit is caught. The self-checking, story-driven format builds real addition fluency while settling 1st, 2nd, and 3rd graders into the new year — perfect for the first days of school, 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 2-digit addition with regrouping (carrying)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrades:\u003c\/strong\u003e 1–3 (1st, 2nd, 3rd)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e 3 no-prep printable mystery worksheets in full color and black \u0026amp; white + suspect lists + full answer keys (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTheme:\u003c\/strong\u003e Back-to-School Math Detective Mystery\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe 3 Mysteries\u003c\/h3\u003e\u003cp\u003eEach case pairs an addition worksheet with a suspect line-up: students solve the sums, match answers to the clues, and cross off suspects until one is left:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase One: The Teacher's Lunchbox\u003c\/strong\u003e — The teacher's lunchbox has vanished on the first day back. Add your way through the clues to work out which suspect took it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Two: The Missing Teacher\u003c\/strong\u003e — A teacher has gone missing from school. Solve the sums to eliminate suspects and track them down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Three: The Missing Art Supplies\u003c\/strong\u003e — The classroom's art supplies have disappeared. Add to reveal who is hiding them.\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; a print-friendly black \u0026amp; white version is included too.\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 two 2-digit numbers with regrouping (carrying)\u003c\/li\u003e\n\u003cli\u003ePlace value and column addition\u003c\/li\u003e\n\u003cli\u003eAddition fact fluency and accuracy\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\u003e3 print-and-go mystery worksheets (one per case), in full color and black \u0026amp; white\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-week activities, math centers, independent practice, morning work, homework, early finishers, substitute\/relief days, indoor recess, and spiral review — any time you want 2-digit addition practice that feels like a game.\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62005334704498,"sku":"10013422","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/2-digit-addition-with-regrouping-back-to-school-math-mystery-detective-cover.jpg?v=1783215500","url":"https:\/\/kiwilandeducation.com\/products\/2-digit-addition-with-regrouping-back-to-school-math-mystery-grades-1-3-detective-mystery","provider":"Kiwiland Education","version":"1.0","type":"link"}