The addition of two whole numbers is the total amount of those quantities combined.
Addition is written using the plus sign “+” between the terms; that is, in infix notation. The result is expressed with an equals sign.
(“one plus one equals two”)
(“two plus two equals four”) and etc.,
ADDITION SIGN RULES:
If signs are the same, add and keep the sign same:
Case 1: If sign of both numbers are positive,then the result will have positive sign.
(a) (+3) + (+6) = (+9)
(b) (+18) + (+2) = (+20) and etc.,
Case 2: If signs o both numbers are negative,then the result will have negative sign.
(c) (-3) + (-6) = (-9)
(d) (-18) + (-2) = (-20) and etc.,
If signs are different, then subtract and keep the sign of larger value.
Case 1: If sign of the larger value us positive sign, then, the result will have positive sign.
(e) (+6) + (-3) = (+3)
(f) (-2) + (+18) = (+16)
Case 2: If sign of the larger value us negative sign, then, the result will have negative sign.
(e) (-6) + (+3) = (-3)
(f) (+2) + (-18) = (-16)