Math Mysteries Uncovered Detective Hunt

Grade 4 Mathematics Detective Adventures with Numbers 20-Minute Investigation

I Can Statements - Our Detective Goals

I can solve addition and subtraction problems involving multi-digit numbers using place value I can use numbers, patterns, and clues to solve mysteries like a math detective I can explain my reasoning using evidence from place value and number patterns

Detective Training: Place Value Review

Hundreds place = 100s Tens place = 10s Ones place = 1s Example: 543 = 5 hundreds + 4 tens + 3 ones

Detective Mystery Example

Detective Hunt Rules & Success Criteria

{"left":"Work in pairs of 2 students\nSolve clues using place value strategies\nRecord answers clearly on detective notebook\nCome to whiteboard to submit answers","right":"Successfully locate and decode all classroom clues\nCorrectly solve multi-digit addition and subtraction\nExplain reasoning using math evidence\nWork collaboratively and listen to others"}

Number Pattern Detective Skills

Look for patterns in sequences Example: 150, 140, 130, ?, ? Each number decreases by 10 Next numbers: 120, 110

Ready for the Hunt?

What strategies will help you solve math mysteries? How can you work well with your detective partner? What should you do if you get stuck on a clue?

Reflection: What Made You a Great Math Detective?

Which strategy helped you most today? How did understanding place value make problems easier? What was your favorite mystery clue? How did working with a partner help you solve problems?