About This Chapter
Elementary Math: Rounding & Estimation - Chapter Summary
Elementary math instructors must be skilled at teaching their students about rounding and estimation. In this chapter, you'll review several lessons that go over instructional strategies for elementary-level math concepts, such as front-end estimation, rounding decimals, missing digits, quotient estimation and more. When you're finished with all of the chapter's lessons, you should be able to:
- Explain the rules for rounding numbers
- Use front-end estimation
- Round decimals
- Find missing digits
- Consider two decimals and estimate the sum and difference between them
- Estimate products and quotients
To practice applying your understanding of these math instruction topics and problem-solving methods, take the chapter's self-assessment quizzes. If you need clarification of a particular concept, you can always reach out to our subject-matter experts online. The chapter is accessible at any time of day or night, and you can study these resources on any device that has an Internet connection.
1. Rounding Numbers: Definition & Rules
Rounding a number is useful when you want to estimate a value. To round a number, you need to follow three simple steps, which you will learn in this lesson.
2. How to Use Front-End Estimation
In this video lesson, you will learn how to estimate addition and subtraction problems by using the method of front end estimation. Learn what is involved and what you need to be careful of.
3. Rounding Decimals & Finding the Missing Digit
After watching this video lesson, you will learn how to round decimals and how to use your knowledge of rounding to help you find a missing digit. Learn what the difference is between rounding decimals and rounding regular numbers.
4. Estimating the Sum & Difference Between Two Decimals
In this video lesson, you will learn how to take an addition or subtraction problem with decimals and estimate the answer by rounding. You will learn that a rounded answer is very close to the actual answer.
5. How to Estimate Products
In multiplication problems, sometimes we want to get an answer that is 'close enough,' not exact. In this lesson, you will learn how to estimate products to get a 'close enough' answer.
6. How to Estimate Quotients
It may seem crazy to think you can quickly estimate the answer to something like 81,837/95 but by the end of this lesson, you'll be able to easily estimate quotients of simple and more difficult division problems. After the lesson, test your new knowledge with practice examples.
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