Exploring Opposites and Absolute Values of Rational Numbers

This lesson covers identifying opposites and absolute values of rational numbers. It begins with an introduction to the concepts, followed by practical examples using water levels relative to sea level. The lesson then explores how to find opposites of rational numbers on a number line, using a stock exchange example to illustrate the concept. Finally, it explains absolute values of rational numbers, emphasizing their distance from zero on a number line.

What is the elevation of sea level?

• -100 feet

• 1 foot

• 100 feet

• 0 feet

At what time was the tide level exactly at sea level?

• 4 PM

• Noon

• 8 AM

• 4 AM

Which point represents the highest tide level?

• Point D

• Point C

• Point B

• Point A

What is the opposite of a positive rational number?

• A larger positive number

• The same number with a negative sign

• An unrelated number

• Zero

How is the opposite of -4 and 1/4 represented?

• -4 and 1/4

• -4 and 3/4

• 4 and 1/4

• 0

What was the method used to price shares on the New York Stock Exchange before June 1997?

• In halves

• In eighths

• In quarters

• In tenths

What is the absolute value of -5.4?

• 5.4

• 0

• -5.4

• 5

How do we find the absolute value of a rational number?

• By adding it to zero

• By finding its opposite

• By measuring its distance from zero

• By squaring it

Which year had the lowest average January temperature?

• 2010

• 2009

• 2008

• 2011

What does the absolute value of a number represent?

• Its maximum value

• Its distance from 0

• Its distance from -1

• Its distance from 1