My thought process went, "a dollar is 90 cents more than 10 cents, so $1.05 is a dollar more than five cents". I made exactly the same fallacy as those in this

My thought process went, "a dollar is 90 cents more than 10 cents, so $1.05 is a dollar more than five cents". I made exactly the same fallacy as those in this study; I've just learned to check my work. On the other hand, I suspect the whole process of estimation and refinement was faster than writing out those equations.