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Math Concepts and Estimation Flashcards

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

Read the first 7 Math Concepts and Estimation flashcards as text

  1. Which of the following is the best estimate for 48 × 21?

    Answer: 1,000

    Rounding 48 to 50 and 21 to 20 gives 50 × 20 = 1,000, which is the closest estimate.

  2. What is the value of the digit 7 in the number 3,742?

    Answer: 700

    The digit 7 is in the hundreds place, so its value is 700.

  3. A rectangle has a length of 12 cm and a width of 5 cm. What is its area?

    Answer: 60 cm²

    Area of a rectangle = length × width = 12 × 5 = 60 cm².

  4. Which number is between 3/4 and 1 on a number line?

    Answer: 7/8

    7/8 = 0.875, which falls between 3/4 (0.75) and 1 (1.0).

  5. If a bag of apples weighs about 3.7 pounds, which is the best estimate of the total weight of 6 bags?

    Answer: 22 pounds

    Rounding 3.7 to 4 gives 4 × 6 = 24, but the actual answer 3.7 × 6 = 22.2 is closest to 22 pounds.

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

    Answer: 12

    The smallest number divisible by both 4 and 6 is 12 (4×3 = 12, 6×2 = 12).

  7. A store sells notebooks for $2.95 each. About how much would 8 notebooks cost?

    Answer: $24

    Rounding $2.95 to $3 and multiplying by 8 gives $24, which is the best estimate.