tap the numbers and click the signs to calculate or type. Scratch can't handle this properly so there are some limitations. Please look at notes and credits for limitations + key = addition - key = subtraction * key = multiplication / key = division c = clear (c, not C) = key = equals
limitations include no negatives, 2 numbers only (no 1+1+1 only 1+1 =+1), no big numbers (10000000000+), Sorry for the inconvenience if you do want to know the negative if the number is bigger than the other and it is sub or div then add a dash to the number at the start. when you click the = button you can't add on, you have to click the CLEAR button to do more computations