{"product_id":"rational-and-irrational-numbers-mystery-detective","title":"Rational and Irrational Numbers | Mystery Detective | Grades 7–10 | Bank Vault","description":"\u003cp\u003eThese rational and irrational numbers worksheets give your 8th grade class ten CSI Mini Mystery Detective math cases on repeating decimals to fractions and on telling rational numbers from irrational ones. Each case takes place in a bank vault, and it's 8.NS.A.1 real number system practice for any point in the unit, from the first lesson to test prep. Use it as a math center, for homework, or as an early finisher activity. It's no prep, and every case has an answer key.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEvery repeating decimal is printed with the bar over the repeating digits, the same way your textbook writes it. The rational vs irrational numbers questions mix square roots, π, fractions and decimals, and students have to look at each number in turn. They match every answer to a suspect's badge and cross that suspect off. If the work is right, there's only one suspect left at the end.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10 one-page cases with 20 questions each, and an answer key for every case\u003c\/li\u003e\n  \u003cli\u003eOn each page, 14 repeating decimals to write as fractions and 6 questions where students pick the rational or the irrational number\u003c\/li\u003e\n  \u003cli\u003eA reference page with worked examples. Put it on the board or give out copies\u003c\/li\u003e\n  \u003cli\u003eContents page, teacher instructions, a case log and a certificate\u003c\/li\u003e\n  \u003cli\u003e30 pages, black and white\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Empty Deposit Box\u003c\/strong\u003e - a deposit box emptied with the lock untouched\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Cloned Keycard\u003c\/strong\u003e - a copied keycard used to get past the guards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Silent Alarm\u003c\/strong\u003e - the vault alarm switched off for an hour\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Frozen Cameras\u003c\/strong\u003e - every vault camera stuck on one picture\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Stolen Gold Bars\u003c\/strong\u003e - gold bars missing from the lower vault\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Forged Signature\u003c\/strong\u003e - a withdrawal slip signed in the owner's name\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Cracked Combination\u003c\/strong\u003e - the vault opened on the first try\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Midnight Tunnel\u003c\/strong\u003e - a tunnel dug up under the vault floor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Vanishing Diamond\u003c\/strong\u003e - a diamond swapped for glass on a tour\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Inside Job\u003c\/strong\u003e - someone in the bank behind every heist\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStart with Case 1 once your class has seen how to turn a repeating decimal into a fraction. The first two cases use one or two repeating digits. After that come repeats that start one place after the decimal point, then three-digit repeats, and the last two cases add numbers greater than one. Terminating and repeating decimals both turn up in the rational and irrational questions, which makes the later cases good for review before a test. The pack also works for small groups, bell ringers, sub days and homeschool, and Algebra 1 teachers can use it to revisit the real number system.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMade for 8th grade (8.NS.A.1). It's also a quick number system review for 9th graders starting Algebra 1.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love Mystery Detectives\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNo prep. Print the case you need and hand it out\u003c\/li\u003e\n  \u003cli\u003eStudents check their own work as they cross off suspects\u003c\/li\u003e\n  \u003cli\u003eProper bar notation on every repeating decimal\u003c\/li\u003e\n  \u003cli\u003eRepeating decimals to fractions and rational vs irrational practice in the same pack\u003c\/li\u003e\n  \u003cli\u003eBlack and white pages that photocopy well\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWant more cases like these?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFollow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for middle school and high school classrooms.\u003c\/p\u003e\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":62593083441522,"sku":"17942525","price":4.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/rational-and-irrational-numbers-8th-grade-math-repeating-decimals-mystery.jpg?v=1792612416","url":"https:\/\/kiwilandeducation.com\/products\/rational-and-irrational-numbers-mystery-detective","provider":"Kiwiland Education","version":"1.0","type":"link"}