Several pens lie along the ruler.
Look at how far each pen reaches.
Write down how long each pen is and compare the numbers.
The filled-in example below shows the answer.
Example
For parents
What does this exercise practice?
The child reads the length of each pen off the ruler and writes it down, the basis of all measuring.
Common pitfalls
Count up to the tip, and every pen starts at 0. Counting the first mark as 1 gives a length that is one too long.
How to practice at home
Measure pencils, spoons or books with a ruler, write down the centimeters and then compare the numbers.
Related: Comparing, Block Towers