2-Digit by 2-Digit Multiplication

Inside the case file

Multi digit multiplication worksheets for 4th grade and 5th grade, 2 digit by 2 digit throughout, five math cases under Mystery Detective rules with the full algorithm on every problem. No prep, print and go, full answer keys and a black and white set, for math centers, morning work, early finishers, homework, test prep and sub plans in any month. For 4th grade and 5th grade students who know the method and need it to stick, this is 2 digit by 2 digit multiplication practice with a school mystery on every page to keep them at it. It suits a math center, a homework week or a test prep run, and the CSI Mini Mystery Detective format means students check their own work.

Two by two digit multiplication is the first time students carry a partial product and then add, and it takes practice to get steady. The case format makes that practice something they ask for, and the marking is student-led, with answer keys included. Twenty products a page and five pages of math lead to one Mystery Detective culprit at the end.

Students set out each problem with the standard algorithm, then look for the product among the clues on the right of the page. A matching clue gets crossed off. The cases are school stories, like a stolen skateboard and a box of chocolates left on the teacher's desk, and the student is the investigator. Every page checks itself as they go.

The Cases

1. The Missing Skateboard - a friend's skateboard stolen
2. Teacher Appreciation Gift - who left the teacher a gift
3. The Singer - someone singing in the music room
4. Chocolates - an unsigned box of chocolates
5. Acts Of Kindness - good deeds around the school

What's Inside

• Five case pages in color
• The same five cases in black and white
• Answer keys for every case
• A teacher instruction page
• 2 digit by 2 digit multiplication on every page

What Is a CSI Mini Mystery Detective?

Each case fits on one page. The problems are on the left and the clue lists are on the right, and every clue has a number. When an answer matches a clue, the student crosses it off. The clues that are still there at the end tell them who did it.

When to Use This Resource

Use these after the standard algorithm has been taught, when students need more problems to work through on their own. They're also useful the week before a multiplication test. Hand one out for morning work, send one home, or leave the set in your sub folder.

Grade Levels

Written for 4th grade and 5th grade. 6th graders who still need multi digit multiplication practice can use them too.

Why Teachers Love These Cases

• No prep
• Color and black and white in one download
• Students can see when a product doesn't match
• Five separate cases

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