Rounding Numbers and Estimation

The video tutorial explains the concept of rounding numbers, highlighting its benefits in simplifying numbers and estimating answers. It covers the rules for rounding to the nearest tens and hundreds, providing examples for each. The tutorial includes practice exercises and concludes with an introduction to the Bottle Learning platform, which offers interactive math games.

Why is rounding numbers useful?

• It increases the number of digits in a number.

• It helps in estimating and remembering numbers easily.

• It makes calculations more complex.

• It makes numbers harder to understand.

What is the result of rounding 22 plus 17 using estimation?

• 30

• 45

• 35

• 40

What is the estimated sum of 22 and 17 when rounded to the nearest tens?

• 60

• 50

• 40

• 30

What is the result of rounding 197 coins to the nearest hundred?

• 150

• 100

• 200

• 250

What is the first step in rounding a number to the nearest tens?

• Look at the hundreds place.

• Look at the tens place.

• Look at the ones place.

• Look at the thousands place.

If the ones digit is 3, what should you do when rounding to the nearest tens?

• Round up.

• Round down.

• Subtract 5 from the number.

• Add 5 to the number.

When rounding 46 to the nearest tens, what is the result?

• 50

• 40

• 45

• 60

What digit do you look at when rounding to the nearest hundreds?

• Ones place

• Tens place

• Thousands place

• Hundreds place

If the tens digit is 8, what should you do when rounding to the nearest hundreds?

• Round down.

• Subtract 10 from the number.

• Round up.

• Add 10 to the number.

What is 316 rounded to the nearest hundreds?

• 300

• 320

• 350

• 400