0
Wiki User
(Average times the total number of addends) minus the given sum of the addends.
Uriel.
29
The missing addend is 1.
Sum
addend+addend=sum
correct.
missing addend
you have to count up all of the addends
248
Addend + Addend=Sum
Addend
Addend Addend Sum
Both are called addend
addendaddend
Identity property