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Number Sense and Operations Flashcards

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

Read the first 7 Number Sense and Operations flashcards as text

  1. What is 15% of 80?

    Answer: 12

    15% of 80 = 0.15 × 80 = 12.

  2. A number is multiplied by -3, and the result is -18. What is the number?

    Answer: 6

    If -3 × n = -18, then n = -18 ÷ -3 = 6.

  3. What is the least common multiple (LCM) of 4 and 6?

    Answer: 12

    Multiples of 4: 4, 8, 12… and of 6: 6, 12…; the smallest shared multiple is 12.

  4. Which expression represents '5 less than twice a number n'?

    Answer: 2n - 5

    'Twice a number n' is 2n, and '5 less than' means subtract 5, giving 2n - 5.

  5. What is the value of √144?

    Answer: 12

    12 × 12 = 144, so √144 = 12.

  6. A price increased from $40 to $50. What is the percent increase?

    Answer: 25%

    Percent increase = (10/40) × 100 = 25%.

  7. Which set of numbers is arranged in order from greatest to least?

    Answer: 2, 0, -3, -5

    Greatest to least means positive numbers first: 2, then 0, -3, -5.