Natural numbers   »      

At the start of the web page
an addition or subtraction problem
with two two-digit numbers was created.

Click on the number between 1 and 100,
which you think is the solution.
A second click on the same number will undo the selection.

Click on  check  to check your answer.
Click on  new  to create a new problem.

Can you top 295 points?

Adding and Subtracting
Mental arithmetic

... more than just practicing

for free education