M2.6.2 For the adult
Millimetres and kilometres
Which unit is for an ant? Which is for a long road?
What this chapter teaches
Small things are measured in millimetres and long ways in kilometres. 10 mm make 1 cm, 1 000 mm make 1 m and 1 000 m make 1 km. Choosing the unit that fits the thing is part of the skill.
Three questions to ask
There is no one right wording. Listen for the idea.
- Which unit would you use for an ant, a book, a room and a road, and why?
- How many millimetres are in 1 cm? How can you picture that on a ruler?
- A road is 2 km 500 m long. How would you say that in metres?
After the chapter, the learner can
- Measure small things to the nearest millimetre
- Say that 1 000 m make 1 km
- Choose the right unit: mm, cm, m or km
What they copy into their notebook
10 mm make 1 cm. 1 000 mm make 1 m. 1 000 m make 1 km. Use mm for an ant. Use cm for a book. Use m for a room. Use km for a road.