We are the people of calculus, addition, and subtraction,

However, with the inclusion of the negative natural numbers, and, importantly, , Z (unlike the natural numbers) is also closed under subtraction.

In 1964, further study of the mineral identified inconsistencies between electron density subtraction maps and the chemical evidence that abernathyite contains potassium.

I suspect most of you I hope that's true for the rest of you actually do pretty well with addition and subtraction in the real world.

The cost of incarcerating two million Americans one of the highest per capita rates in the world should be viewed as a subtraction from GDP, yet it is added on.

They must know three things They must have good handwriting, because the data is handwritten they must be able to read and they must be able to do multiplication, division, addition and subtraction in their head.

And I wondered, what if the answer to some of our biggest problems could be found in the smallest of places, where the difference between what is valuable and what is worthless is merely the addition or subtraction of a few atoms?

The CPU could do the four fundamental functions of arithmetic so addition, multiplication, subtraction, division which already is a bit of a feat in metal, but it could also do something that a computer does and a calculator doesn't this machine could look at its own internal memory and make a decision.