PARCC Estimation Sequence 2 — Questions and Answers
Question 1: A theater holds 38 rows of 52 seats. Which front-end estimate is most reasonable for the total number of seats?
- 2,000 (Correct answer)
- 1,500
- 3,000
- 1,000
Correct answer: 2,000
Rounding to 40 × 50 gives 2,000, the closest sensible estimate.
Question 2: Maria estimates 297 + 412 + 188 by rounding each to the nearest hundred. What is her estimate?
- 900 (Correct answer)
- 800
- 1,000
- 700
Correct answer: 900
300 + 400 + 200 equals 900.
Question 3: Which situation calls for an OVERestimate rather than a close estimate?
- Making sure you have enough money to buy several items (Correct answer)
- Reporting an exact bank balance
- Counting attendance for a record
- Measuring medicine doses
Correct answer: Making sure you have enough money to buy several items
Overestimating ensures you bring enough money to cover the purchase.
Question 4: Estimate the quotient 6,238 ÷ 78 using compatible numbers.
- 80 (Correct answer)
- 60
- 100
- 40
Correct answer: 80
Using 6,400 ÷ 80 gives a compatible estimate of 80.
Question 5: A student rounds 4.86 to the nearest whole number, then to the nearest tenth. Which pair is correct?
- 5 and 4.9 (Correct answer)
- 4 and 4.8
- 5 and 4.8
- 4 and 4.9
Correct answer: 5 and 4.9
4.86 rounds to 5 (whole) and 4.9 (tenth).
Question 6: Which estimate for 19 × 21 shows clustering around a single number?
- 20 × 20 = 400 (Correct answer)
- 10 × 20 = 200
- 19 × 19 = 361
- 21 × 21 = 441
Correct answer: 20 × 20 = 400
Both factors cluster near 20, so 20 × 20 = 400 estimates the product.
Question 7: Estimating 503 − 198 by rounding to the nearest hundred gives which result?
- 300 (Correct answer)
- 400
- 200
- 350
Correct answer: 300
500 − 200 equals 300.
PARCC Estimation Sequence 2
A theater holds 38 rows of 52 seats.
Which front-end estimate is most reasonable for the total number of seats?