{"product_id":"adding-and-subtracting-decimals-mystery-detective-worksheets-grades-4-6-printable-detective-pack","title":"Adding and Subtracting Decimals | Mystery Detective Worksheets | Grades 4–6 | Printable Detective Pack","description":"\u003cp\u003eAdding and subtracting decimals worksheets for 5th grade, used again in 6th: five CSI Mini Mystery Detective math cases where students line up the decimal points, find the suspect with that answer and cross the name off until one is left. Every answer matches a single suspect, so a misplaced decimal point shows up on the lineup before it shows up on a test. Print and go with full answer keys: math activities for the decimals unit, then math centers, early finishers, homework, morning work, test prep and sub plans all year.\u003c\/p\u003e\n\n\u003cp\u003eFive CSI Mini Mystery Detective math cases in one file is a week of decimal practice without handing out the same page twice, and the lineup does the checking so you are not marking the same slip twenty times. Use one with the whole class after the lesson, then keep the rest for early finishers and the sub folder.\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\u003eThe Museum Theft\u003c\/strong\u003e - the museum loses its treasure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecret Blueprint Heist\u003c\/strong\u003e - the blueprint is stolen overnight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMissing Secret Sauce\u003c\/strong\u003e - the kitchen loses its famous recipe\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChampionship Soccer Ball\u003c\/strong\u003e - gone hours before the big game\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExperimental Lab\u003c\/strong\u003e - somebody sabotaged the whole lab\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\u003eAdding and subtracting decimals on every page, to 5th grade standard\u003c\/li\u003e\n  \u003cli\u003eNumbers with different numbers of decimal places, so students have to line them up\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 a printable case with a lineup of suspects, each carrying a number. The questions on the crime sheet produce those numbers, a correct answer strikes one suspect off, and the last name standing is the culprit. Because the elimination depends on the arithmetic, these detective activities catch mistakes that a page of math worksheets would let through. One case takes a class period, with nothing to prepare and nothing to buy.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eUse this in the decimal unit once the class can add and subtract but is still lining the columns up by the last digit instead of the point. That single habit is behind most of the wrong answers, and it hides beautifully on a normal worksheet. Here it crosses off the wrong suspect, so the student sees the problem and goes back to the place value rather than the arithmetic.\u003c\/p\u003e\n\n\u003cp\u003eIt suits test prep, homework, math centers, morning work, early finishers, sub plans, homeschool lessons and spiral review, with a 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 5th grade, where adding and subtracting decimals sits in the standards, and used with 6th graders as fluency practice. Fourth graders take it once decimal place value is secure, and 7th graders use it as a refresher before operations with negatives.\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\u003eMixed decimal places, so students have to line the points up themselves\u003c\/li\u003e\n  \u003cli\u003eStudents catch their own errors when the wrong suspect comes off the lineup\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 and middle school 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":61955114664306,"sku":"9454637","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/adding-and-subtracting-decimals-worksheets-5th-grade-9454637.jpg?v=1792461132","url":"https:\/\/kiwilandeducation.com\/products\/adding-and-subtracting-decimals-mystery-detective-worksheets-grades-4-6-printable-detective-pack","provider":"Kiwiland Education","version":"1.0","type":"link"}