Add / subtract with parenthesis (6 terms)

Longer expressions require students to track multiple operations and avoid skipping steps, making careful written work and left-to-right evaluation habits especially important.

Students can rewrite the expression at each step, replacing the evaluated parenthetical with its result, so they can clearly track progress through all six terms.

Extended expressions are used in some state assessments to evaluate students' ability to apply order-of-operations rules consistently across multiple steps.