add, to join together sets to find the total or sum, plus, the symbol used to show addition, true, something that is real, opposite of false, false, something that is not true, part, one of the two parts joined to make a whole, equals, the sign used to show the same value or is the same as, whole, sum of two parts, sum, answer to an addition problem, addition number sentence, an expression using numbers and the + and = sign, addend, a number added to another number

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