Addition Equation
An equation with one unknown, called the missing term, which is either of the two terms or their sum.
Examples
In each of the equations below, the unknown is represented by a [latex]□[/latex].- [latex]7 + □ = 12[/latex]
- [latex]□ + 5 = 12[/latex]
- [latex]7 + 5 = □[/latex]