{"product_id":"back-to-school-3-digit-addition-mystery-detective","title":"Back to School 3-Digit Addition | Mystery Detective Worksheets | Grades 2–5","description":"\u003cp\u003eBack to school 3 digit addition with regrouping worksheets for 2nd grade, 3rd grade and 4th grade, set out as five printable CSI Mini Mystery Detective cases. Students carry across three digit columns, match each total to a clue and cross a suspect off until one is left. These are no prep August and September math activities for math centers, morning work, early finishers, homework and sub plans, print and go from the first page. One download holds five school themed cases, a full black and white set and answer keys, ready for the first week back.\u003c\/p\u003e\n\n\u003cp\u003eThree digit carrying is the first thing a long vacation takes away, and the first weeks back are when you need to see where a class actually is without spending a lesson on it. A case does that quietly: a wrong total matches no clue, so the page tells the student before it tells you, and you get to watch who is checking and who is guessing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWelcome Back Cake for the Teachers - who made it\u003c\/li\u003e\n  \u003cli\u003eThe Missing Pens - somebody has taken them\u003c\/li\u003e\n  \u003cli\u003eNew Student to the School - working out who is who\u003c\/li\u003e\n  \u003cli\u003eShowing Mindfulness - a count that does not add up\u003c\/li\u003e\n  \u003cli\u003eMath Book Not Named - the last case of the set\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFive color case pages, sixteen addition problems on each\u003c\/li\u003e\n  \u003cli\u003eThe same five cases again in black and white\u003c\/li\u003e\n  \u003cli\u003eAn answer key for every case\u003c\/li\u003e\n  \u003cli\u003eA color in page for early finishers\u003c\/li\u003e\n  \u003cli\u003eA teacher instruction page, print and go with nothing to prepare\u003c\/li\u003e\n  \u003cli\u003eThree digit addition with regrouping throughout\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\u003eOne printed page holding one crime and the clue list that solves it. Each clue carries a number, the sixteen sums on the page produce those numbers, and a correct total knocks a clue out. Work to the last question and a single suspect is left standing. Get a column wrong and nothing matches, which sends a student back over their working before you ever see it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eReach for this in the first weeks of the year, once three digit addition has been taught and simply needs keeping warm, and again as a refresher after any long break. It works as homework, as a center, and as a set to leave for a substitute. Use it for math centers, morning work, early finishers, homework, sub plans and homeschool lessons, with a whole class, a small group or one student.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWritten for 2nd grade, 3rd grade and 4th grade. Fifth graders who still need column addition firmed up get plenty out of it, and confident second graders manage it with a little support.\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 wrong total matches no clue, so students catch their own slips\u003c\/li\u003e\n  \u003cli\u003eColor and black and white are both in the download\u003c\/li\u003e\n  \u003cli\u003eA color in page for whoever finishes first\u003c\/li\u003e\n  \u003cli\u003eFive cases covers the whole first week back\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eLove this resource?\u003c\/strong\u003e\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\"\u003ehttps:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\u003c\/a\u003e\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62593076003186,"sku":"5832866","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/back-to-school-3-digit-addition-with-regrouping-worksheets-grade-3.jpg?v=1792612253","url":"https:\/\/kiwilandeducation.com\/products\/back-to-school-3-digit-addition-mystery-detective","provider":"Kiwiland Education","version":"1.0","type":"link"}