There is a number on the roof of the house.
Every floor has two boxes side by side.
Write two numbers side by side on each floor
that add up to the roof number.
The filled in number house next to it shows the answer.
Example
What does this exercise practice?
This exercise strengthens the understanding of splitting: a number can be split into two parts in many ways.
Common pitfalls
Children sometimes write the same split on every floor. Asking helps: is there another way to split the 7 into two numbers?
How to practice at home
Play with a box and marbles: how many are in the lid, how many in the box? Count both amounts and add them up.
Related: Break apart, Wall