Rounding Numbers: Key Concepts and Techniques

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 and decimals to specific decimal places. It also delves into rounding numbers to significant figures, using real-world examples like the distance from Earth to the Sun. The video concludes with a summary and encourages viewers to engage with the content.

What is the basic rule for rounding a number that is below 5?

• Round down to the lower limit

• Keep the number as it is

• Round up to the nearest value

• Round to the nearest even number

When rounding 43 to the nearest ten, what is the result?

• 45

• 43

• 40

• 50

If you round 46 to the nearest ten, what do you get?

• 40

• 45

• 50

• 55

How would you round 5.32 to one decimal place?

• 5.5

• 5.2

• 5.3

• 5.4

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

• 5.2

• 5.5

• 5.3

• 5.4

What is a significant figure?

• Any number including zeros

• Any number between 0 and 9

• Any number excluding zeros

• Any number between 1 and 9

Which zero is significant in the number 40,710?

• The zero in the thousands place

• None of the zeros are significant

• The zero in the tens place

• The zero in the hundreds place

How would you round 31,248 to one significant figure?

• 40,000

• 30,000

• 32,000

• 31,000

What is the result of rounding 42,085 to two significant figures?

• 42,090

• 42,080

• 42,100

• 42,000

How would you round 0.65 to one significant figure?

• 0.6

• 0.65

• 0.7

• 0.66