Evaluating expressions with and without parentheses | Pre-Algebra | Khan Academy
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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-systems-introduction?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra
Missed the previous lesson?
https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/constructing-numeric-expressions/v/constructing-numerical-expressions-example?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra
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