A Rote learning or memorization is a common element in mathematics education, for instance in memorization of multiplication tables.
American cheese has one of the highest amount of carbs compared to most cheeses. Blue cheese has around .66 grams of carbs per ounce while brie cheese only contains .13 grams. Cheddar cheese has around .36 grams of carbs. One ounce of cheese is equivalent to around one slice. Larger portions of cheese contain more total grams of carbs. Cheese contains small amounts of sugar.
The good news is that McDonald's provides all of this information on its website. A cheeseburger has 33 grams of carbohydrates. Take away the bun and 28 of the grams disappear. In this way, you can discover that there is 1 gram of carb in the cheese, 1 gram in the onions, and 2 grams in the ketchup.