Evaluating expressions with and without parentheses | Pre-Algebra | Khan Academy

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About the Video

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/cc-fifth-grade-math/imp-algebraic-thinking/imp-writing-expressions/v/evaluating-an-expression-with-and-without-parentheses

So maybe parentheses don't seem like a big deal? Check out this problem and the difference in the answer when you work it without the parentheses. Wow.

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/constructing-numeric-expressions/e/expressions-with-parentheses?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/number-system...