Rounding and Significant Figures

This video tutorial covers the basics of rounding numbers, focusing on two main types: rounding to decimal places and rounding to significant figures. It explains the fundamental rules of rounding, such as rounding down for values below 5 and rounding up for values 5 and above. The tutorial provides examples of rounding whole numbers to the nearest ten, rounding decimals to a specified number of decimal places, and rounding large numbers to significant figures. The video concludes with a summary and encourages viewers to engage with the content.

What is the rule for rounding a number when the digit to the right is 5 or more?

• Round up to the nearest higher value.

• Round to the nearest even number.

• Keep the number as it is.

• Round down to the nearest lower value.

If you round 43 to the nearest ten, what is the result?

• 45

• 40

• 50

• 43

How do you round 5.32 to one decimal place?

• 5.3

• 5.4

• 5.2

• 5.5

What is the result of rounding 5.32 to one decimal place?

• 5.2

• 5.3

• 5.4

• 5.5

What is a significant figure?

• Any number excluding zeros.

• Any number including zeros.

• Any number between 1 and 9.

• Any number between 0 and 9.

How many significant figures are in the number 3890?

• 4

• 2

• 5

• 3

What is the first significant figure in the number 31,248?

• 4

• 1

• 2

• 3

When rounding 31,248 to one significant figure, what is the result?

• 30,000

• 33,000

• 31,000

• 32,000

Which of the following numbers has a significant zero?

• 0.0001

• 3890

• 0.0715

• 40,710

What is the rounded value of 42,085 to two significant figures?

• 42,000

• 42,100

• 42,090

• 42,080