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Grade 8 Math Flashcards

7 cards from real PARCC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Grade 8 Math flashcards as text

  1. Which number is irrational?

    Answer: √7

    √7 cannot be written as a ratio of integers, so it is irrational.

  2. Solve for x: 5x - 3 = 2x + 12.

    Answer: x = 5

    Subtracting 2x and adding 3 gives 3x = 15, so x = 5.

  3. What is the value of 2^3 × 2^4?

    Answer: 2^7

    Multiplying powers with the same base means adding exponents: 3 + 4 = 7.

  4. A line passes through (0, 2) with slope 3. What is its equation?

    Answer: y = 3x + 2

    Slope-intercept form y = mx + b gives y = 3x + 2.

  5. If two angles of a triangle measure 45° and 65°, what is the third angle?

    Answer: 70°

    Angles in a triangle sum to 180°, so 180 - 45 - 65 = 70°.

  6. What is the cube root of 27?

    Answer: 3

    3 × 3 × 3 = 27, so the cube root of 27 is 3.

  7. Which represents a function?

    Answer: {(1,2),(2,2),(3,2)}

    A function assigns exactly one output to each input, and no input repeats here.