This video tutorial provides practice in estimating division with decimals. It explains how to approximate division problems by rounding numbers to make mental calculations easier. Three examples are given: estimating 80 divided by 1.94 by rounding to 80 divided by 2, estimating 209 divided by 3 by recognizing it as close to 210 divided by 3, and estimating 6.86 divided by 1.12 by rounding to 7 divided by 1. The video emphasizes that these are estimations, not exact calculations.

What does the squiggly equal sign represent in mathematical estimations?

• Greater than

• Less than

• Approximately equal

• Exactly equal

Tags

CCSS.5.NBT.B.7

When estimating 80 divided by 1.94, which number is 1.94 rounded to for easier calculation?

• 2

• 4

• 1

• 3

What is the approximate result of 80 divided by 2?

• 50

• 40

• 30

• 20

Tags

CCSS.4.NBT.B.6

In the second example, which number is 209 rounded to for easier division by 3?

• 230

• 220

• 210

• 200

Tags

CCSS.4.NBT.B.6

What is the result of dividing 210 by 3?

• 60

• 75

• 70

• 65

Tags

CCSS.5.NBT.B.7

When estimating 6.86 divided by 1.12, to which whole number is 6.86 rounded?

• 8

• 7

• 6

• 5

Tags

CCSS.5.NBT.B.7

To which whole number is 1.12 rounded when estimating 6.86 divided by 1.12?

• 2

• 0

• 3

• 1

What is the approximate result of 7 divided by 1?

• 7

• 8

• 5

• 6

Why is it important to understand that these calculations are estimations?

• They provide exact answers

• They simplify complex calculations

• They are always incorrect

• They are only used in advanced mathematics

Which of the following is NOT a reason to use estimation in division?

• To avoid using a calculator

• To find the exact answer

• To simplify mental calculations

• To get a rough idea of the result