Rounding and Estimation
Math ⇒ Number and Operations
Rounding and Estimation starts at 6 and continues till grade 12.
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See sample questions for grade 6
A class collected 1,487 cans for recycling. About how many cans is this to the nearest hundred?
A store has 2,347 apples. About how many apples is this to the nearest hundred?
Estimate the difference between 7,892 and 3,456 by rounding both numbers to the nearest thousand before subtracting.
Estimate the difference between 9,876 and 4,321 by rounding both numbers to the nearest thousand before subtracting.
Estimate the product of 49 × 21 by rounding each number to the nearest ten before multiplying.
Estimate the quotient of 1,234 ÷ 6 by rounding 1,234 to the nearest hundred before dividing.
Estimate the sum of 1,234 and 5,678 by rounding each number to the nearest thousand before adding.
Estimate the sum of 2,345 and 1,678 by rounding each number to the nearest hundred before adding.
Estimate the sum of 3,456 and 4,789 by rounding each number to the nearest thousand before adding.
Explain why estimation is useful when checking the reasonableness of an answer.
If a number is 5,678, what is it rounded to the nearest thousand?
If you round 2,999 to the nearest hundred, what do you get?
Round 1,999 to the nearest thousand.
Round 2,222 to the nearest ten.
Round 3,456 to the nearest hundred and to the nearest thousand.
Round 4,678 to the nearest hundred.
Round 7,777 to the nearest hundred.
Round 8,251 to the nearest ten.
Round 9,999 to the nearest thousand.
What is the purpose of estimation in mathematics?
