{"product_id":"missing-numbers-to-120-back-to-school-math-mystery-grades-1-2-detective-mystery","title":"Missing Numbers to 120 | Back to School Math Mystery | Grades 1–2 | Detective Mystery","description":"\u003cp\u003e\u003cstrong\u003eFilling in the missing numbers to 120 turns detective when the teacher's lunchbox vanishes, a whole teacher goes missing, and the classroom art supplies disappear.\u003c\/strong\u003e In this no-prep, printable back-to-school \u003cstrong\u003eMath Mystery\u003c\/strong\u003e, students work as private detectives who find the \u003cstrong\u003emissing numbers to 120\u003c\/strong\u003e (1 more, 1 less, before and after), match each answer to a suspect, and eliminate names until the culprit is caught. The self-checking, story-driven format builds real number-sequence and place-value fluency while easing 1st and 2nd 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 Missing numbers to 120 — 1 more, 1 less, before and after\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrades:\u003c\/strong\u003e 1–2 (1st, 2nd)\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 a number-chart worksheet with a suspect line-up: students fill in the missing numbers, 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 Teacher's Lunchbox\u003c\/strong\u003e — The teacher's lunchbox has gone missing. Fill in the missing numbers 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 number puzzles 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. Find the missing numbers to reveal who took 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\u003eFinding missing numbers to 120 (number sequences)\u003c\/li\u003e\n\u003cli\u003e1 more, 1 less, before and after\u003c\/li\u003e\n\u003cli\u003ePlace value and counting 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\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-weeks activities, math centers, independent practice, morning work, homework, early finishers, substitute\/relief days, indoor recess, and spiral review — any time you want missing numbers to 120 practice that feels like a game.\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62005465055602,"sku":"10067300","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/missing-numbers-to-120-back-to-school-math-mystery-detective-cover.jpg?v=1783220717","url":"https:\/\/kiwilandeducation.com\/products\/missing-numbers-to-120-back-to-school-math-mystery-grades-1-2-detective-mystery","provider":"Kiwiland Education","version":"1.0","type":"link"}