Spring Math Mystery – Case File (2–3 Digit Addition & Subtraction) | Grade 3–4

Description

Turn springtime math practice into a fun “case file” mystery! Students solve 4 clues per page using 3-digit ± 2-digit addition and subtraction, then use a simple code table to crack the Final Code and identify the correct suspect. This resource keeps students engaged while building accuracy, place value understanding, and reasoning skills.

What’s Included (15 pages total) :

- 12 Mystery Case Pages (student pages)

- 2 Answer Key Pages

- 1 Cover Page

✅ Black-and-white friendly for easy printing

How It Works :

- Solve CLUE 1–CLUE 4 (3-digit ± 2-digit).

- Match each answer to the Code Table (A–F).

- Write the letters to form the Final Code.

- Find the suspect with the matching code and answer the final question.

Skills Students Practice :

- 2–3 digit addition & subtraction

- Regrouping (when needed)

- Place value + number sense

- Multi-step reasoning and checking work

- Math fluency in a fun, low-prep format

Why Teachers Love It :

- Print-and-go (no prep!)

- High engagement: mystery + suspects + final reveal

- Great for math centers, early finishers, small groups, review, test prep, homework, sub plans

- Easy to differentiate: assign specific pages, pair work, or timed practice

Why Students Love It :

- Feels like solving a real mystery

- Clear structure: 4 clues → final code

- Confidence boost when they “crack the case”

Suggested Use :

- Whole-class warm-up or daily review

- Partner or team detective challenge

- Independent practice / homework

- Assessment or spiral review