Estimation is the process of finding an approximate value for a quantity when the exact value is not known or is impractical to find. It is an important skill in mathematics and everyday life.

There are two main types of estimation:

**Rounding:**Rounding is the process of finding a nearby value that is easier to work with. For example, rounding 347 to the nearest ten gives 350.**Front-End Estimation:**Front-end estimation is a method of estimation where only the first digits of the numbers are used to find the approximate sum or difference. For example, to estimate 347 + 289, you would add 300 + 200 to get 500.

Estimation is used in various real-life situations such as:

- Estimating costs for a project
- Estimating time required for a task
- Estimating the amount of ingredients needed for a recipe
- Estimating distances when traveling

There are several techniques for estimation, including:

**Compatible numbers:**Choosing numbers that are easy to work with and close to the actual values.**Front-end estimation:**Using the first digits of numbers to estimate sums and differences.**Rounding:**Approximating numbers to the nearest ten, hundred, or thousand to simplify calculations.

Here are some practice problems to test your estimation skills:

- Estimate the sum of 456 and 278 using rounding.
- Estimate the difference between 789 and 342 using front-end estimation.
- Estimate the product of 23 and 47 using compatible numbers.

Remember, estimation is a valuable skill that can help you make quick and reasonable approximations in various situations.

Study GuidePerimeter Activity LessonPerimeter Activity LessonPolygon Perimeter Activity LessonAmazing Areas Worksheet/Answer key

Perimeter Worksheet/Answer key

Perimeter Worksheet/Answer key

Perimeter Worksheet/Answer keyDot to Dot Worksheet/Answer keyTriangle Inequality Theorem Worksheet/Answer keyPark Perimeter Worksheet/Answer keyPolygon Perimeters Vocabulary/Answer keyPerimeter

Geometry (NCTM)

Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.

Use visualization, spatial reasoning, and geometric modeling to solve problems.

Use geometric models to solve problems in other areas of mathematics, such as number and measurement.