Natural numbers   »      

The arithmetic house has a cellar,
a first floor and a roof.
Two numbers are on the first floor.

In the roof is the sum of these two numbers,
in the cellar their difference.

Determine the missing numbers.

Pay attention to the arithmetic operations.

Click on  check  to check your answer.
Click on  new  to create a new problem.
Can you top 345 points?

Arithmetic house in ℕhelp
-level 3-

... more than just practicing

for free education

Allow keyboard