Psss.... did you know that
2.156.367
tests have already been made here ?

Also try how good you are at mental arithmetic!

Arithmetic without time? Go to leren-rekenen.nl

Here you learn arithmetic error-free for FREE

SQUARES

What are squares?

A multiplication is for eaxample 7 x 7 = 49 Also: 4 x 4 = 16. Both numbers are the same!

You can rewrite this and than it becomes:

7² = 49

4² = 16

Give it a try!