LET’S TRY ONE
A scale drawing uses 1 cm for 100 cm in real life. A line on the drawing is 2 cm long. What is its real length in centimeters?
200
Each drawing centimeter represents 100 real centimeters. 2 × 100 = 200 cm.
Learning steps & teaching tips
Convert a drawing measurement to a real measurement using a scale.
- Keep the drawing and real-life units in corresponding positions.
- Work through the example and explain why each operation is used.
- Estimate or use another method to check the result before choosing.
Try it together
Work with a partner: solve one example, explain the method, then change one number and predict what changes.
Keep the drawing and real-life units in corresponding positions.