Additive Inverse in the Real World

What is the additive inverse of 7?

• 7

• -7

• 0

• 14

What is the additive inverse of -11?

• 11

• -11

• 0

• 22

• -22

My mom paid me $15, but I still owed my friend $17.

• Combines to make 0

• Does not combine to make 0

A hot air balloon rises to 15,000 feet above the ground and then goes down 15,000 feet to land.

• Combines to make 0

• Does not combine to make 0

A scuba diver dives 20 feet below sea level and then rises 20 feet back to the top of the water.

• Combines to make 0

• Does not combine to make 0

Which situation results in a final value of 0?

• a bank account with a balance of -$25.00 after a $25.00 deposit

• the overall change in altitude of a hot air balloon after rising 21 kilometers from sea level

• the total distance a person travels when he bikes 3.1 miles to school and then bikes 3.1 miles back home

Which situation describes a hiker in Death Valley stopping at an altitude of 0 feet?

• The hiker starts at -10 feet then increases altitude by 10 feet.

• The hiker starts at -10 feet then decreases altitude by 10 feet.

• The hiker starts at 10 feet then increases altitude by 10 feet.

• The hiker starts at 0 feet then decreases altitude by 10 feet.

Timothy earned $200 last week and then spent $200 on a video game.

• Combines to make 0

• Does not combine to make 0

Tammy lost 15 pounds on her diet. She gained 8 pounds during the Holiday season and 7 pounds over Spring Break.

• Combines to make 0

• Does not combine to make 0

Giani’s bank credited her account $100. After getting paid, Giani deposited $100 into her account.

• Combines to make 0

• Does not combine to make 0