Understanding Opposites and Zero

This lesson, led by Mr. Hul, explores the concept of opposites in mathematics, focusing on how each non-zero integer has an opposite that is equidistant from zero on a number line. The lesson includes examples and exercises to locate and label opposite numbers, apply the concept to real-world situations like sea level and temperature, and understand financial transactions. The lesson also features a practical example involving a map to illustrate distances and opposites. The session concludes with a summary of key points and encourages students to practice further.

What is the opposite of a non-zero integer 'a'?

• a

• -a

• a + 1

• 0

If a number is 8 units to the right of zero, where is its opposite?

• 16 units to the right

• 8 units to the left

• At zero

• 8 units to the right

What does zero represent in the context of sea level?

• 100 feet above sea level

• 100 feet below sea level

• Sea level

• 32 degrees Celsius

How would you represent 32 degrees Celsius above zero?

• -32°C

• 0°C

• 32°C

• 64°C

If a withdrawal of $25 is represented as -25, how would you represent a deposit of $25?

• 25

• 50

• -25

• 0

In Maria's journey, how many blocks is the Furry Friends Pet Shop from the bookstore?

• 10 blocks

• 7 blocks

• 3 blocks

• 5 blocks

What does zero represent in the context of a bank account?

• A debit of $15

• No money in the account

• A credit of $15

• A deposit of $25

What is the opposite of 20 degrees Celsius below zero?

• 40 degrees Celsius

• 20 degrees Celsius above zero

• 0 degrees Celsius

• 20 degrees Celsius below zero

How many protons are represented by the integer 5?

• 7 protons

• 10 protons

• 5 protons

• 3 protons

What is the integer representation of three electrons?

• 6

• 0

• -3

• 3