{"product_id":"3-digit-addition-with-regrouping-mystery-detective-worksheets-grades-2-4-halloween-zombie-theme","title":"3-Digit Addition with Regrouping | Mystery Detective Worksheets | Grades 2–4 | Halloween Zombie Theme","description":"\u003cp\u003eHalloween zombie math worksheets for 2nd grade and 3rd grade: five Mystery Detective style math cases on 3 digit addition with regrouping. Print and go with full answer keys, no prep, for October math centers, early finishers, homework and sub plans. Zombies take over the school, a classmate is not human, a friend needs saving and a leader needs finding, with carrying across the tens and hundreds on every page; the right sum clears a suspect and the wrong one clears nobody, which is why a class stays on a CSI Mini Mystery Detective to the last sum.\u003c\/p\u003e\n\n\u003cp\u003eOctober is when this one earns its keep, the two weeks before Halloween most of all, and a zombie leader to find is why a class works five CSI Mini Mystery Detective math cases of addition with real enthusiasm. Each total points at one suspect, so students check their carrying before they cross anyone off, and the answer keys make the marking quick. Pair it with the zombie subtraction pack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZombies Take Over\u003c\/strong\u003e - find somewhere safe to hide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZombie Classmate\u003c\/strong\u003e - one classmate is not human\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSave your friend\u003c\/strong\u003e - a friend is lost in the chase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZombie Leader\u003c\/strong\u003e - find who is giving the orders\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZombie Teacher\u003c\/strong\u003e - find the cure before the bell\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFive case files, each with a crime sheet and its own lineup of suspects\u003c\/li\u003e\n  \u003cli\u003eThree digit addition with regrouping on every page\u003c\/li\u003e\n  \u003cli\u003eCarrying needed in more than one column, so it is real regrouping practice\u003c\/li\u003e\n  \u003cli\u003eEach answer matches one suspect and no other, so the page checks itself\u003c\/li\u003e\n  \u003cli\u003eA full answer key for every case\u003c\/li\u003e\n  \u003cli\u003ePrint and go: no cutting, no laminating, nothing to prepare\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is a CSI Mini Mystery Detective?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA CSI Mini Mystery Detective gives your class a crime, a lineup and a page of questions, and the only route to the culprit runs through the math. Each suspect wears a number, each correct answer matches one of them, and that name is struck off until a single suspect is left. Because a wrong sum rules out the wrong person, these detective activities push students to check their work in a way math worksheets do not. One case fills a class period.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eOctober is when most teachers pull this out, but the five cases run as a story, which makes it just as useful as a week of morning work whenever three digit addition needs keeping alive. Boys who will not touch a worksheet will finish a zombie case, and that is most of the battle. A missed carry names the wrong suspect, so students check their own columns before they hand anything in.\u003c\/p\u003e\n\n\u003cp\u003eUse it for test prep, homework, math centers, morning work, early finishers, sub plans and homeschool lessons, with a whole class, a small group or one child alone.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWritten for 2nd grade and 3rd grade, where three digit addition with regrouping sits in the standards. Fourth graders take it as an October warm up, and second graders manage it once two digit carrying is secure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love These Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eA story that runs across five cases, so students want the next page\u003c\/li\u003e\n  \u003cli\u003eStudents find a missed carry themselves when the wrong name comes off\u003c\/li\u003e\n  \u003cli\u003eNo prep, and the answer keys make grading quick\u003c\/li\u003e\n  \u003cli\u003eWorks with a whole class, a small group, partners, or one student alone\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLove this resource?\u003c\/p\u003e\n\n\u003cp\u003eFollow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for elementary classrooms.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\" target=\"_blank\" rel=\"noopener\"\u003eFollow Kiwiland Education on TPT ↗\u003c\/a\u003e\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61955719070066,"sku":"6650210","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/halloween-3-digit-addition-with-regrouping-worksheets-2nd-3rd-grade-6650210.jpg?v=1792460694","url":"https:\/\/kiwilandeducation.com\/products\/3-digit-addition-with-regrouping-mystery-detective-worksheets-grades-2-4-halloween-zombie-theme","provider":"Kiwiland Education","version":"1.0","type":"link"}