Review of Introductory Mathematics
This chapter covers the processes of addition, subtraction, division, and
multiplication of signed numbers.
APPLY one of the arithmetic operations of addition,
subtraction, multiplication, and division using signed numbers.
Calculator Usage, Special Keys
Change Sign key
Pressing this key changes the sign of the number in the display. To enter
a negative number, the number is entered as a positive number and then
the change sign key is pressed to convert it to a negative. The display will
show a "-" in front of the number.
Addition of signed numbers may be performed in any order. Begin with one number and count
to the right if the other number is positive or count to the left if the other number is negative.
2 + 3 = 0 - 2 + 3
Begin with 2 and count 3 whole numbers to the right.
Therefore: -2 + 3 = 1