Apparently, using models they can see and handle and manipulate helps young people better understand the principles of addition, subtraction and multiplication, helping them move on to the more ...

The confusion (likely intentional) boiled down to a discrepancy between the math rules used in grade school and in high school.

Now that you've learned to do basic math in Excel, your calculations will never slow you down again. With addition, subtraction, multiplication, and division at your fingertips, Excel can become ...

TOKYO -- A team of scientists in Japan recently announced the discovery of nerve cells that strongly respond to addition and subtraction in the brains of monkeys.

Object Details Description This illustrated pamphlet describes the operation of manual and electrically operated versions of the Underwood Sundstrand printing adding machine. Addition, subtraction, ...