Simplify the expression 3a + 5a − 2a.

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Prepare for the Praxis Elementary Education: Three Subject Bundle – Mathematics (5903) Exam. Utilize flashcards and questions with explanations to ace your test! Enhance your mathematics skills for better results.

Multiple Choice

Simplify the expression 3a + 5a − 2a.

Explanation:
Combine like terms by adding coefficients: since every term has the same variable a, you add the numbers in front of a. 3a + 5a − 2a = (3 + 5 − 2)a = 6a. This shows you’re counting how many a’s you have: three plus five makes eight, then removing two leaves six. If you forgot the subtraction you’d get 8a; if you somehow canceled everything you’d get 0; and if you added all positives without the subtraction you’d get 10a.

Combine like terms by adding coefficients: since every term has the same variable a, you add the numbers in front of a. 3a + 5a − 2a = (3 + 5 − 2)a = 6a. This shows you’re counting how many a’s you have: three plus five makes eight, then removing two leaves six. If you forgot the subtraction you’d get 8a; if you somehow canceled everything you’d get 0; and if you added all positives without the subtraction you’d get 10a.

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