{"product_id":"2-digit-subtraction-with-regrouping-mystery-detective-worksheets-grades-1-3-valentines-day","title":"2-Digit Subtraction with Regrouping | Mystery Detective Worksheets | Grades 1–3 | Valentine's Day","description":"\u003cp\u003eValentines Day 2 digit subtraction with regrouping math worksheets for 1st grade and 2nd grade: five short math cases, each a Mystery Detective page. No prep, print and go, full answer keys, for math centers, morning work, early finishers, homework and sub plans in February. Chocolates with no name, a card with no signature and flowers left overnight carry the cases, each answer crosses a suspect off the lineup until the culprit is left, and the borrowing underneath is the practice a young class needs, on a CSI Mini Mystery Detective page they will finish.\u003c\/p\u003e\n\n\u003cp\u003eFebruary is when this gets used, but the subtraction is the point and the cards and chocolates are only the setting, so it is still useful in April. Each answer a child works out rules a suspect out, so the page is self-marking, and one CSI Mini Mystery Detective math case fits a morning work slot.\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\u003eChocolates for Teacher\u003c\/strong\u003e - chocolates and no name attached\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValentines Day Card\u003c\/strong\u003e - a card with no signature\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLove Songs\u003c\/strong\u003e - somebody is singing love songs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBunch of Flowers\u003c\/strong\u003e - left on the teacher's desk overnight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActs of Kindness\u003c\/strong\u003e - good deeds with nobody taking credit\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\u003eTwo digit subtraction with regrouping on every page\u003c\/li\u003e\n  \u003cli\u003eBorrowing needed on most problems, so it is not a mixed set\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 is one printed page carrying one crime and one lineup. Each suspect has a number, the crime sheet produces those numbers, and a correct answer removes that suspect until a single name is left. Nothing is laminated, charged or bought, so the math does the whole job, and that is the difference between these detective activities and a page of math worksheets. A case runs about 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\u003eUse these in the run up to Valentines Day, when borrowing has been taught and needs repetitions but nobody is in the mood for another page of sums. Five short cases spread across the week, so you are not handing out the same sheet twice. A child who takes the smaller digit from the larger one crosses off the wrong suspect and sees the problem for themselves.\u003c\/p\u003e\n\n\u003cp\u003eIt covers test prep, homework, math centers, morning work, early finishers, sub plans and homeschool lessons, with a 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 1st grade and 2nd grade, where two digit subtraction with regrouping sits in the standards. Third graders take it as a February refresher, and first graders manage it once subtracting without borrowing 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\u003eBorrowing on nearly every problem, not one or two per page\u003c\/li\u003e\n  \u003cli\u003eStudents catch the classic subtraction habit themselves\u003c\/li\u003e\n  \u003cli\u003eNo prep in the week of Valentines Day\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":62008106320242,"sku":"5181585","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/valentines-day-2-digit-subtraction-with-regrouping-worksheets-5181585.jpg?v=1792460555","url":"https:\/\/kiwilandeducation.com\/products\/2-digit-subtraction-with-regrouping-mystery-detective-worksheets-grades-1-3-valentines-day","provider":"Kiwiland Education","version":"1.0","type":"link"}