2-Digit by 2-Digit Multiplication

Inside the case file

Five Christmas math cases, each a Mystery Detective page of 2 digit by 2 digit long multiplication for 4th grade and 5th grade, where every product crosses a classmate, a person or a place off the clue list. The whole school's presents have gone, somebody ate the gingerbread and a parcel on the teacher's desk has no explanation, and the multiplication is the only way to the culprit. Print and go with full answer keys: no prep December math worksheets and Mystery Detective cases for morning work, math centers, early finishers, homework and sub plans.

Long multiplication in the last fortnight of term is a hard ask, and a missing pile of Christmas presents is what makes it happen. Each product has to land on a clue, so a slipped carry shows up on the page before it shows up in your marking, and one case a day covers the fortnight. Each CSI Mini Mystery Detective math page is marked in a minute with the key.

The school's Christmas presents have gone missing, someone has eaten the gingerbread, and nobody knows who the Secret Santa is. Students work each product with partial products, then cross off the matching name or place on the clue list. They can see for themselves whether their working was right.

The Cases

1. Missing Xmas Presents - where the school presents are
2. Who Ate The Gingerbread - which classmate ate it
3. Secret Santa - who the Secret Santa is
4. Teachers Xmas Present - what's in the teacher's present
5. Christmas Fruitcake - who baked the Christmas cake

What's Inside

• Five Christmas case pages
• 2 digit by 2 digit multiplication on every page
• A clue list on each page
• Answer keys for all five
• Teacher instructions

What Is a CSI Mini Mystery Detective?

A CSI Mini Mystery Detective is one page with a Christmas story, a set of problems and a clue list. Every clue on the list has a number next to it. Students cross off clues as their answers match, and the clue that's left solves the case.

When to Use This Resource

Use these in the weeks before winter break. The multiplication isn't seasonal, so they can also come out later as long multiplication review. They work as morning work, for a class party day, as homework or on a sub day.

Grade Levels

Written for 4th grade and 5th grade.

Why Teachers Love These Cases

• A Christmas theme your class will enjoy
• Long multiplication practice in December
• No prep
• Five separate cases

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