The phrase "addition figures" generally refers to numbers that are being added together. There are a variety of synonyms for this concept, including "sums," "totals," "addends," "augends," and "plus-marks." Each of these terms refers to a different aspect of addition. "Sum" and "total" both refer to the final result of an addition problem, while "addend" and "augend" refer to the numbers being added. "Plus-mark" is a less commonly used synonym, referring to the symbol used in addition operations. Regardless of which synonym you use, the concept of addition figures remains fundamental to mathematics and everyday life.