Subtract real numbers

Subtract real numbers


 Recall that the answer to a subtraction problem is called the difference. Thus, the difference between 6 and 4 is 2. To see how subtraction should be defined, compare the following

two statements.

6 – 4 = 2

6 + (-4) = 2




For all real numbers a and b,

    a – b = a + (-b).

In words, change the sign of the second number (subtrahend) and add.


Leave a Reply

Your email address will not be published. Required fields are marked *