Rounding and Estimation
Math ⇒ Number and Operations
Rounding and Estimation starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Rounding and Estimation.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
A company produced 12,345 units in January and 15,678 units in February. Estimate the total production by rounding each value to the nearest hundred.
A measurement is recorded as 0.05678 meters. What is this value rounded to three significant figures?
A scientist records a value as 6.023 × 1023. If this value is rounded to three significant figures, what is the result?
A student estimates the product of 198 and 52 by rounding both numbers to the nearest ten. What is the estimated product?
A company produced 12,345 units in January and 15,678 units in February. Estimate the total production by rounding each value to the nearest hundred.
A measurement is recorded as 0.05678 meters. What is this value rounded to three significant figures?
A scientist records a value as 6.023 × 1023. If this value is rounded to three significant figures, what is the result?
A student estimates the product of 198 and 52 by rounding both numbers to the nearest ten. What is the estimated product?
Which of the following is the best estimate for 49.7 × 21.3?
(1) 50 × 20
(2) 50 × 21
(3) 49 × 21
(4) 49 × 20
Which of the following is the best estimate for the sum of 3,789 and 4,212?
(1) 8,000
(2) 7,900
(3) 7,800
(4) 7,000
Which of the following is the correct rounding of 0.123456 to four decimal places?
(1) 0.1234
(2) 0.1235
(3) 0.1240
(4) 0.1230
Which of the following is the correct rounding of 12,498 to the nearest hundred?
(1) 12,400
(2) 12,500
(3) 12,490
(4) 12,000
Fill in the blank: 0.00789 rounded to two decimal places is _______.
Fill in the blank: 2,345 rounded to the nearest ten is _______.
Fill in the blank: 3.14159 rounded to two decimal places is _______.
Fill in the blank: The number 0.000789 rounded to two significant figures is _______.
Is it always true that rounding a sum is the same as summing rounded numbers?
True or False: Rounding 2.675 to two decimal places gives 2.68.
True or False: When rounding a number to the nearest ten, if the units digit is 5 or greater, you round up.
True or False: When rounding to the nearest whole number, 2.5 becomes 2.
