Algebra Essentials Quiz
MediumMultiple-choice practice with instant feedback — pick an answer, see the rationale, and every miss is scheduled back into your flashcard reviews. Progress saves in this browser.
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Terms in this set
- Rates & Unit Rate A rate compares two quantities with different units (miles per hour, dollars per pound); a unit rate has a denominator of 1 and is found by dividing.
- One-Variable Equations Solving for an unknown by performing the same inverse operation on both sides until the variable stands alone: undo addition with subtraction, multiplication with division.
- Inequalities Statements comparing expressions with <, >, <=, or >=, solved like equations with one critical exception: multiplying or dividing both sides by a negative number reverses the inequality sign.
- Absolute Value A number's distance from zero on the number line, always non-negative: |5| = 5 and |-5| = 5.
- Rational & Irrational Numbers Rational numbers can be written as a fraction of two integers (including all terminating and repeating decimals); irrational numbers cannot — their decimals never terminate or repeat (pi, square root of 2).
- Estimation & Rounding Rounding replaces a number with a simpler one at a given place value — look one digit to the right: 5 or more rounds up, 4 or less rounds down — and estimation uses rounded numbers to approximate an answer.
- Translating Word Problems Converting English phrases into math: 'sum' and 'more than' mean add, 'difference' and 'less than' mean subtract, 'of' and 'product' mean multiply, 'per' and 'quotient' mean divide, 'is' means equals.