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How to use estimation to check your answers | Year 3 Mathematics PDF Download

Understanding Estimation for Checking Answers

What is Estimation?

Estimation is a useful technique to quickly get an approximate value of a calculation by rounding numbers to make them simpler.
How to use estimation to check your answers | Year 3 Mathematics

Why Use Estimation?

Estimation provides a rough idea of the result before doing the actual calculation. If the final result is significantly different from the estimated value, it indicates a mistake in the calculation.

How to Apply Estimation

Here's how you can use estimation to check your answers:

  • Round the numbers involved in the calculation to make them easier to work with.
  • Perform the calculation using these rounded numbers.
  • If the calculated result is vastly different from the estimated value, revisit the calculation to identify and correct any errors.
  • If necessary, try using a different method to arrive at the correct answer.

Question for How to use estimation to check your answers
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What is the purpose of using estimation in calculations?
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FAQs on How to use estimation to check your answers - Year 3 Mathematics

1. How can estimation be used to check answers when rounding numbers in the millions?
Ans. Estimation can be used by rounding each number to the nearest million and performing the calculation with the rounded numbers to quickly check if the answer is reasonable.
2. What is the benefit of rounding numbers in the millions?
Ans. Rounding numbers in the millions makes calculations easier and quicker, especially when dealing with large numbers.
3. Can rounding numbers in the millions lead to exact answers?
Ans. Rounding numbers in the millions will not give exact answers, but it provides a close estimate that can be used to check the accuracy of calculations.
4. How can rounding numbers in the millions be useful in real-life situations?
Ans. Rounding numbers in the millions can be useful when estimating costs, budgets, populations, or any other large quantities in everyday scenarios.
5. Are there any limitations to using estimation when rounding numbers in the millions?
Ans. Estimation when rounding numbers in the millions may not always provide precise results, so it is important to use it as a quick check rather than a definitive answer.
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