Problem 15 Estimate by rounding as directed... [FREE SOLUTION] (2024)

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Estimation is a fundamental concept in mathematics that helps in quickly finding an answer without needing an exact figure.
Here’s why it’s useful:

• Simplifies complex calculations
• Saves time
• Offers a quick check on the accuracy of detailed calculations

When estimating, it’s important to round numbers to the nearest ten, hundred, or other convenient value.
This gives a general sense of the size of the numbers and the result of the operation.
For example, in our exercise, by rounding 198.67432 to 200 and 24.5007 to 20, subtraction becomes straightforward.
Learn to estimate well, and you’ll find yourself more comfortable with numbers in daily life and exams.

Subtraction is a basic arithmetic operation that represents the operation of removing objects from a collection.
In our task, after rounding the numbers, we needed to subtract 20 from 200. Here’s how subtraction works step-by-step:
When subtracting smaller numbers from larger numbers, you essentially reduce the quantity.
For instance:

• Start with the larger number: 200.
• Subtract the smaller number: 200 - 20.
• The result is 180.

Subtracting rounded numbers simplifies the process and provides an approximation close to the exact result.
It’s much easier to deal with especially when working with large or very detailed numbers.
Understanding subtraction and practicing it with rounding and estimation will improve accuracy and speed in solving mathematical problems.