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NBT Mathematics: Number Sense and Calculations Flashcards

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

Read the first 7 NBT Mathematics: Number Sense and Calculations flashcards as text

  1. What is the greatest common factor (GCF) of 84 and 126?

    Answer: 42

    84 = 2² × 3 × 7 and 126 = 2 × 3² × 7, so GCF = 2 × 3 × 7 = 42.

  2. Express 4.5 × 10⁻³ in standard notation.

    Answer: 0.0045

    Moving the decimal 3 places left gives 0.0045.

  3. If p is a prime number greater than 2, which statement is always true?

    Answer: p is odd

    All prime numbers greater than 2 are odd, since any even number greater than 2 is divisible by 2.

  4. A recipe uses 2⅓ cups of flour. If you want to make 1½ times the recipe, how many cups of flour do you need?

    Answer: 3½ cups

    2⅓ × 1½ = (7/3) × (3/2) = 21/6 = 7/2 = 3½ cups.

  5. Which of the following has the greatest value?

    Answer: 0.67

    0.67 is slightly greater than 2/3 ≈ 0.6667; 67% = 0.67 = 0.67 exactly, and 0.6̄ = 2/3, so 0.67 and 67% are equal and greatest.

  6. The product of two consecutive even integers is 168. What is the smaller integer?

    Answer: 12

    12 × 14 = 168, so the smaller consecutive even integer is 12.

  7. What is 15% of 15% of 400?

    Answer: 9

    15% of 400 = 60, then 15% of 60 = 9.