{"product_id":"addition-skip-counting-csi-math-mystery-worksheets-grades-3-6-the-number-on-the-loose","title":"Addition \u0026 Skip Counting CSI Math Mystery Worksheets | Grades 3–6 | The Number on the Loose","description":"\u003cp\u003eMake skip counting and addition review feel like a case worth cracking. A two-digit number is loose somewhere on the hundreds chart, and your students are the detectives assigned to bring it in. This printable \u003cstrong\u003eSkip Counting \u0026amp; Addition CSI Math Mystery\u003c\/strong\u003e is built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with skip counting and addition and subtraction within 100. No apps, no prep, no fuss.\u003c\/p\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for 3rd–5th; works as a 6th-grade warm-up or review)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Skip counting by 4s and 5s, addition \u0026amp; subtraction within 100, comparing and sorting numbers\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 9+ pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA number has gone on the run, and it left its fingerprints all over the hundreds chart. Your students pull on their detective coats, sharpen their pencils, and report to the crime scene — the only way to catch the culprit is to follow the math.\u003c\/p\u003e\n\u003cp\u003eThe trail starts with a coded message. Students crack the cipher to reveal their first lead, then chase the suspect through the patterns it left behind: skip counting by fives, tracing a skip-counting-by-fours path across the hundreds chart, and matching each clue against the lineup of suspects. With every pattern they uncover, more numbers are cleared and the net tightens.\u003c\/p\u003e\n\u003cp\u003eNext come the witnesses. A full page of addition and subtraction problems within 100 narrows the field to the final stretch — but two suspects still won't confess. In the last interrogation, a hundreds-chart puzzle forces the truth into the open and names the number that did it.\u003c\/p\u003e\n\u003cp\u003eHand your students the evidence, point them at the suspects, and let them prove they can close the case. The math is the only thing standing between them and the truth.\u003c\/p\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSkip counting by 5s\u003c\/li\u003e\n  \u003cli\u003eSkip counting by 4s on a hundreds chart\u003c\/li\u003e\n  \u003cli\u003eAdding and subtracting within 100\u003c\/li\u003e\n  \u003cli\u003eComparing and sorting numbers\u003c\/li\u003e\n  \u003cli\u003eCompleting a hundreds chart\u003c\/li\u003e\n  \u003cli\u003eCode breaking with addition\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style math mystery activity\u003c\/li\u003e\n  \u003cli\u003eSkip counting and addition clue pages\u003c\/li\u003e\n  \u003cli\u003eHundreds-chart puzzles\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and end-of-year math review (and all-year use)\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eEnd-of-unit review\u003c\/li\u003e\n  \u003cli\u003eSkip counting and addition practice and reinforcement\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61980769485170,"sku":"2671758","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/addition-skip-counting-csi-math-mystery-grades-3-6-cover.jpg?v=1782475528","url":"https:\/\/kiwilandeducation.com\/products\/addition-skip-counting-csi-math-mystery-worksheets-grades-3-6-the-number-on-the-loose","provider":"Kiwiland Education","version":"1.0","type":"link"}