On the bar you see marks like on a ruler.
Each mark is one centimeter.
Here's how:
1. Start at the left end of the bar at 0.
2. Count the sections to the right end.
3. Write the number together with the unit cm.
The number filled in shows the solution.
Example
For parents
What does this exercise practice?
Confidently read lengths on a scale and prepare for measuring with a ruler.
Common pitfalls
Children often count the marks instead of the sections and end up with one too many. It helps to always count the gaps between them.
How to practice at home
Use a real ruler to measure pencils, books or your own hand and compare the lengths.
Related: Read the ruler, Converting Units, Comparing Measurements