On one petal there is a starting number.
The same rule applies on every petal, for example always 10 more.
Calculate on from petal to petal and write the result in each petal.
Example: the first petal shows 20, every following petal should show 10 more.
The next petal shows 30, then 40, then 50 and so on.
The numbers filled in show the solution.
Example
For parents
What does this exercise practice?
Calculate step by step in tens and fill in the results confidently.
Common pitfalls
Children easily lose the direction. Say it out loud (20, then 30, then 40).
How to practice at home
Count in tens together, on the stairs or with coins.
Related: Calculation, Neighbor numbers, Number line