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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 approximate value of √50, rounded to the nearest integer?

    Answer: 7

    Since 7² = 49 and 8² = 64, √50 ≈ 7.07, which rounds to 7.

  2. What is 3.4567 rounded to 2 decimal places?

    Answer: 3.46

    The third decimal digit is 6 (≥ 5), so the second decimal place rounds up from 5 to 6, giving 3.46.

  3. Which value is greater: 2¹⁰ or 10³?

    Answer: 2¹⁰ is greater

    2¹⁰ = 1024 and 10³ = 1000, so 2¹⁰ is greater by 24.

  4. What is the standard numerical value of 3.2 × 10⁴?

    Answer: 32,000

    Multiplying by 10⁴ moves the decimal point 4 places to the right, so 3.2 becomes 32,000.

  5. The sum of three consecutive even integers is 78. What is the largest of the three integers?

    Answer: 28

    Let the integers be n, n+2, n+4: solving 3n + 6 = 78 gives n = 24, so the largest is 28.

  6. What is the value of 9 × 0.111...?

    Answer: 1

    The repeating decimal 0.111... equals 1/9, so 9 × (1/9) = 1.

  7. What is the greatest common factor (GCF) of 48 and 72?

    Answer: 24

    The prime factorizations are 48 = 2⁴ × 3 and 72 = 2³ × 3², so GCF = 2³ × 3 = 24.