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Math: Estimation and Measurement Flashcards

7 cards from real CBEST 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: Estimation and Measurement flashcards as text

  1. A recipe calls for 2¾ cups of flour. Which estimate is most reasonable when doubling the recipe?

    Answer: About 6 cups

    2¾ × 2 = 5½ cups, which rounds to about 6 cups.

  2. A rectangular room measures 13.8 feet by 9.2 feet. Which is the best estimate of its area?

    Answer: 126 sq ft

    13.8 × 9.2 ≈ 14 × 9 = 126 sq ft is the closest estimate.

  3. Which metric unit is most appropriate for measuring the mass of a textbook?

    Answer: Kilogram

    A textbook typically weighs around 0.5–2 kilograms, making kilograms the appropriate unit.

  4. A car travels 287 miles in 4.9 hours. Which best estimates its average speed?

    Answer: About 60 mph

    287 ÷ 4.9 ≈ 300 ÷ 5 = 60 mph.

  5. How many millimeters are in 4.5 centimeters?

    Answer: 45 mm

    1 cm = 10 mm, so 4.5 cm × 10 = 45 mm.

  6. A store sells juice in 64-fluid-ounce containers. Approximately how many liters is this? (1 liter ≈ 33.8 fl oz)

    Answer: About 2 liters

    64 ÷ 33.8 ≈ 1.89, which is closest to 2 liters.

  7. A fence post casts a shadow of 3 feet when a nearby 6-foot person casts a shadow of 4 feet. How tall is the fence post?

    Answer: 4.5 feet

    Using proportions: post/3 = 6/4, so post = 18/4 = 4.5 feet.