CBEST Math: Estimation and Measurement 3 — Questions and Answers
Question 1: A swimming pool holds approximately 18,500 gallons. Which is the best estimate of its capacity in thousands of gallons?
- About 16,000 gallons
- About 18,000 gallons (Correct answer)
- About 19,000 gallons
- About 20,000 gallons
Correct answer: About 18,000 gallons
18,500 rounds to 18,000 when rounding to the nearest thousand.
Question 2: A runner completes a 10-kilometer race in 52 minutes. What is the approximate pace per kilometer?
- About 4 minutes
- About 5 minutes (Correct answer)
- About 6 minutes
- About 7 minutes
Correct answer: About 5 minutes
52 ÷ 10 = 5.2 minutes per kilometer, which is approximately 5 minutes.
Question 3: Which temperature is closest to normal human body temperature?
- 37°C (Correct answer)
- 98°C
- 37°F
- 100°C
Correct answer: 37°C
Normal body temperature is 98.6°F, which equals approximately 37°C.
Question 4: A bag of potatoes weighs 5 pounds 8 ounces. How many total ounces does it weigh?
- 58 ounces
- 80 ounces
- 88 ounces (Correct answer)
- 96 ounces
Correct answer: 88 ounces
5 pounds × 16 oz/lb = 80 oz, plus 8 oz = 88 oz total.
Question 5: A classroom floor measures 24 feet by 30 feet. If tiles are 1 foot square, approximately how many tiles are needed?
- About 600
- About 700
- About 720 (Correct answer)
- About 750
Correct answer: About 720
24 × 30 = 720 square feet, so exactly 720 tiles are needed.
Question 6: Which is the most reasonable estimate for the height of a standard doorway?
- 5 feet
- 6.5 feet (Correct answer)
- 8 feet
- 10 feet
Correct answer: 6.5 feet
Standard residential doorways are typically 6 feet 8 inches, or about 6.5 feet tall.
Question 7: A plumber charges $85 per hour and works for 3 hours 45 minutes. What is the best estimate of the total charge?
- About $280
- About $300
- About $320 (Correct answer)
- About $350
Correct answer: About $320
85 × 3.75 = $318.75, which is closest to about $320.
CBEST Math: Estimation and Measurement 3
A swimming pool holds approximately 18,500 gallons.
Which is the best estimate of its capacity in thousands of gallons?