How should the phrase five times the sum of m and n be translated into algebra?

1. The word sum signals addition, so the sum of m and n becomes m plus n. 2. The word times signals multiplication, and it applies to the whole sum, so parentheses are needed around m plus n. 3. Putting the pieces together gives 5 times the quantity (m plus n). 4. Writing 5m plus n instead multiplies only the m, which is the phrase for the sum of five times m and n, a different quantity. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 2 "The Language of Algebra", section 2.2 Evaluate, Simplify, and Translate Expressions_