Curriculum Resources

Take learning to the next level and transform the way you teach with a vast library of ready-to-use, standards-aligned, adaptable curriculum resources.
The resources listed below are either available with an Online Learning Subscription which allows you to instruct, assess and track student performance or as individual hands-on classroom resources which can be purchased. Choose from Multimedia Lessons, Curriculum Mastery Games, Flip Charts, Visual Learning Guides, Flash Cards, Vocabulary Cards,
and Curriculum Modules available on our online store. PREMIUM ONLINE LEARNING SUBSCRIPTION OPTIONS

- Select By Standard
- CURRICULUM RESOURCES
- General Science
- Life Science / Biology
- Human Body
- Earth Science
- Physical Science
- Chemistry
- Math
- Language Arts
- Social Studies

- Home
- >Curriculum Resources
- >Fifth Grade Mathematics resources
- >
# Estimation Topic

Back

Practice and review the topic selected with illustrated flash cards!

Assess students’ understanding of the topic selected!

Print illustrated worksheets!

Engage students with interactive games.

❮

1

/

2

❯

ESTIMATION Estimation is an approximate calculation. Some uses of rounding are: • Checking to see if you have enough money to buy what you want. • Getting a rough idea of the correct answer to a problem How to Estimate: A quick way to estimate the sum of two numbers is to round each number and then add the rounded numbers. This probably won't be the exact answer but it may be close enough for some purposes. How to estimate a sum by rounding: • Round each term that will be added • Add the rounded numbers • An estimate can sometimes be improved. If the sum of 345 + 440 were estimated, we would round 345 to 300 and 440 to 400. The estimate would be 300 + 400 or 700. Both numbers were rounded down. The number 345 was rounded down by 45 and 440 was rounded down by 40. Adding 45 + 40 gives 85, which rounds to 100. Therefore, a better estimate would be 800. The actual sum is 785. How to improve the estimate: Round each term that will be added Add the rounded numbers If both are rounded down or both rounded up see if the amount of rounding is more than 50. If it is, add or subtract 100 to the estimate. If one number is rounded down and the other is rounded up a closer estimate will not be produced by this method. Example: Estimate the sum of the following group of numbers: 125, 333, 216 round each term: 100, 300, 200 add the numbers: 100 + 300 + 200 = 600 © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.

Try This! Estimate the sum of the following group of numbers: 459, 780, 551 Estimate the sum of the following group of numbers: $3.29, $1.11, $7.32 © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.