My resource is intended for learners between the ages of 7 and 10. It is used to involve children in learning, allowing them to self-correct their calculation exercises. The file can be opened with Scratch online. It is used to verify the accuracy of the calculations. It is prepared for 2 children: one (the one with the name starting with L) must do the division, the other, with the name starting with A, must do the multiplication. The child modifies the numbers by entering those of his exercises and the result obtained, then his name after pressing the flag. If he has done the calculations well, the sprite says good, otherwise he says try again.