{"product_id":"subtracting-mixed-numbers-with-regrouping-mystery-detective","title":"Subtracting Mixed Numbers with Regrouping | Mystery Detective | Grades 3–6","description":"\u003cp\u003eSubtracting mixed numbers with regrouping gets all ten cases in these 4th grade math worksheets, a no prep CSI Mini Mystery Detective pack for the fractions unit. These math activities work for math centers, morning work, small groups and early finishers, and every case has an answer key. It's pirate themed, which makes it an easy pick for Talk Like a Pirate Day.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eRegrouping gets six full cases of its own in this pack, moving from thirds and fourths up to tenths and twelfths and then to big whole numbers. The fractions are printed stacked, the way students write them in their books, and every answer keeps its denominator. Students trade one whole for fourths, eighths or twelfths when the top fraction is too small. They match each answer to a suspect and cross that name off, and each page is self-checking.\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\u003eTen one-page pirate detective cases on subtracting mixed numbers, each with an answer key\u003c\/li\u003e\n\u003cli\u003eA warm-up case with no regrouping\u003c\/li\u003e\n\u003cli\u003eSix regrouping cases, from thirds and fourths through eighths, tenths and twelfths\u003c\/li\u003e\n\u003cli\u003eA case that asks students to decide whether to regroup\u003c\/li\u003e\n\u003cli\u003eWhole numbers minus mixed numbers, such as 6 - 2 3\/8\u003c\/li\u003e\n\u003cli\u003eTwo mixed review cases, including answers less than one whole\u003c\/li\u003e\n\u003cli\u003eA reference page with worked examples of every step\u003c\/li\u003e\n\u003cli\u003eA contents page, teacher instructions, a detective case log and a certificate of achievement\u003c\/li\u003e\n\u003cli\u003e30 black and white pages, ready to print\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 Treasure Chest\u003c\/strong\u003e - a warm-up with no regrouping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Captain's Missing Hook\u003c\/strong\u003e - regrouping thirds, fourths and fifths\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Message in a Bottle\u003c\/strong\u003e - regrouping fifths and sixths\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Spinning Ship's Wheel\u003c\/strong\u003e - regrouping eighths\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Parrot Who Sang\u003c\/strong\u003e - regrouping tenths and twelfths\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Captain's Stolen Hat\u003c\/strong\u003e - bigger whole numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Cannon Full of Socks\u003c\/strong\u003e - deciding whether to regroup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Buried Cutlass\u003c\/strong\u003e - whole numbers minus mixed numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Midnight Fuse\u003c\/strong\u003e - mixed review\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Jolly Roger Swap\u003c\/strong\u003e - mixed review with answers less than one whole\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\u003eThe cases start with a warm-up, then regrouping from thirds up to twelfths, then whole numbers minus mixed numbers. You can hand out one at a time once regrouping has been introduced, or pull a single page when a group needs more practice with a particular denominator. The regroup or not case asks students to check the fractions before they subtract. Guided math groups, homework, test prep, sub plans and homeschool lessons are other good uses.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWritten for 4th grade, where students first subtract mixed numbers with like denominators. The big whole number and mixed review cases give confident 4th graders a stretch, and the pack works as a fractions review early in 5th grade, before unlike denominators.\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 setup\u003c\/li\u003e\n\u003cli\u003eEach answer crosses off a suspect\u003c\/li\u003e\n\u003cli\u003eSix regrouping cases that build step by step\u003c\/li\u003e\n\u003cli\u003eA pirate mystery with a parrot, a cannon and the Jolly Roger\u003c\/li\u003e\n\u003cli\u003ePrints clean in black and white\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 elementary 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":62593131839858,"sku":"17766426","price":4.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/subtracting-mixed-numbers-with-regrouping-4th-grade-math-worksheets-csi-mini-mystery.jpg?v=1792612876","url":"https:\/\/kiwilandeducation.com\/products\/subtracting-mixed-numbers-with-regrouping-mystery-detective","provider":"Kiwiland Education","version":"1.0","type":"link"}