Estimation Strategies in Mathematics

In this video, Mr. J explains the concept of estimation, highlighting its importance in both math and real-world scenarios. He demonstrates front end estimation with examples, showing how to round numbers to their greatest valued digit. Mr. J also introduces an alternative strategy using halfway points to achieve more accurate estimates. Through various examples, he emphasizes the significance of improving number sense for better estimation skills.

What is the purpose of estimation in math and real-world scenarios?

• To find the exact answer

• To determine a reasonable value

• To avoid solving problems

• To make calculations more complex

What does front-end estimation involve?

• Rounding each number to the nearest hundred

• Rounding each number to its greatest valued digit

• Rounding each number to the nearest ten

• Rounding each number to the nearest thousand

Using front-end estimation, what is the approximate result of 87 minus 46?

• 30

• 50

• 40

• 60

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

What is the exact answer for 87 minus 46?

• 43

• 42

• 41

• 40

Using front-end estimation, what is the approximate result of 783 minus 64?

• 720

• 740

• 760

• 700

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

What is the exact answer for 783 minus 64?

• 722

• 719

• 721

• 720

Tags

CCSS.4.NBT.B.5

What is the halfway point strategy in estimation?

• Rounding to a midpoint between two rounded values

• Rounding to the nearest hundred

• Rounding to the nearest thousand

• Rounding to the nearest ten

Using the halfway point strategy, what is the better estimate for 5432 minus 4902?

• 0

• 1000

• 1500

• 500

Tags

CCSS.4.NBT.B.4

What is the exact answer for 5432 minus 4902?

• 530

• 540

• 520

• 500

Which estimate is closer to the exact answer for 2613 minus 889?

• 1400

• 2100

• 1600

• 1500