Several pens lie along the ruler.
Look at how far each pen reaches.
Compare the lengths and find the longest or shortest.
The filled-in example next to it shows the answer.
Example
What does this exercise practice?
The child practises comparing lengths directly from a shared starting line, a basis of measuring.
Common pitfalls
Pens must start at the same point, otherwise the comparison is misleading. Always use the same starting line.
How to practice at home
Lay several pencils next to each other on the table, line them all up evenly and find the longest.