Metric Conversions: Tick or Trash

Year 9 Mathematics Mastering Measurement Madness - Lesson 2 50 minutes

Understanding Metric Prefixes

kilo- means 1000 times bigger centi- means 100 times smaller milli- means 1000 times smaller Remember: Smaller units = Larger numbers

Conversion Flow Chart

Let's Convert Together

Convert 3.5 metres to centimetres Convert 2400 grams to kilograms Convert 750 millilitres to litres Remember to show your working!

Tick or Trash Activity

Work in pairs or small groups Sort conversion cards into 'Tick' (correct) or 'Trash' (incorrect) Be ready to explain your reasoning Examples: '100 cm = 1 m' or '5 kg = 500 g'

Quick Check: Can You Spot the Error?

Sarah says: '3000 mm = 30 cm' Is Sarah correct? Explain your reasoning

Key Takeaways

Converting to smaller units = larger numbers Converting to larger units = smaller numbers Always check your conversion factor Practice makes perfect! Next lesson: Real-world measurement applications