3-Digit by 1-Digit Multiplication

Inside the case file

Halloween zombie math for October, with multi digit multiplication underneath it. 3 digit by 1 digit multiplication for 4th grade and 5th grade, across five zombie CSI Mini Mystery Detective math case files, where students multiply on the crime sheet and strike a suspect off the lineup until one name is left. That gives you math worksheets and math activities in one no prep download, then test prep, math centers, early finishers, homework, morning work, sub plans and spiral review for the rest of the year. No prep CSI math, with detective activities and full answer keys.

Three digit by one digit multiplication, with a zombie outbreak running over the top of it. The story carries across all five cases, and each answer a student works out takes one suspect off the lineup, so they come back for the next page on their own. Good in October with the whole class, and good all year as a math center.

The Cases

1. Find the Zombie - one of them is hiding in school
2. Zombie Classmate - one classmate has changed
3. Zombie Principal - the principal has turned
4. Zombie Attack - the school is turning one by one
5. Zombie Lair - a hidden lair in the school

What's Inside

• Five case files, each with a crime sheet and its own lineup of suspects
• 3 digit by 1 digit multiplication on every page
• Products that need carrying more than once, so it is real multi digit practice
• Each answer matches one suspect and no other, so the page checks itself
• A full answer key for every case
• Print and go: no cutting, no laminating, nothing to prepare

What Is a CSI Mini Mystery Detective?

A CSI Mini Mystery Detective is a single page case your class cracks with math. The suspects stand in a lineup with a number each, the crime sheet produces those numbers, and a correct answer knocks one suspect out until the last name standing is the culprit. There is no kit and nothing to assemble, so what carries it is the arithmetic, which is what makes detective activities land where math worksheets slide off.

When to Use This Resource

October is the month it sells, but the reason to keep it is that fourth graders need many more repetitions of three digit multiplication than the unit allows, and they will do these. The story pulls them from one case to the next. A carry lost in the middle of a product names the wrong suspect, so students check the whole calculation rather than the last digit.

Use it for test prep, homework, math centers, morning work, early finishers, sub plans and homeschool lessons, with a whole class, a small group or one student.

Grade Levels

Written for 4th grade and 5th grade, where multiplying three digits by one sits in the standards. Third graders take it once their facts are fluent, and 6th graders use it as a warm up before two digit multipliers.

Why Teachers Love These Cases

• A story that runs across all five cases, so students keep going
• Students recheck the whole product when the wrong suspect comes off
• No prep in the week of Halloween
• Works with a whole class, a small group, partners, or one student alone

Love this resource?

Follow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for elementary classrooms.

Follow Kiwiland Education on TPT ↗

Buy · $4