1. press a button to get you a number. Pico will say it 2. when you are done with your first number go and set turn1 to 1 this will let you do your other number 3.When you are done with both your numbers then make turn2 1 (note you cannot make turn2 1 before making turn1 1) 4.When turn2 is 1 then scratch cat will ask you what sign you want(ex: x-/+) also note: you cannot make a division equation #/0 it will say error 5. you cannot answer scratch cat's question without your answer being -, +, /, or x. 6. Finally you erase by clicking on the arrow