Subtracting Integers with Different Signs

The video tutorial explains how to subtract integers with different signs using the additive inverse method. It provides examples involving a football team's yard loss, temperature changes, bank account balances, and trivia game scores. The tutorial uses both horizontal and vertical number lines to illustrate the subtraction process and emphasizes changing subtraction to addition by using the additive inverse.

Ian's football team lost two yards and then received a five-yard penalty. What is the team's total change in yards?

• Negative 3 yards

• Negative 5 yards

• Negative 7 yards

• Negative 9 yards

What is the first step in subtracting integers with different signs?

• Change the subtraction to addition

• Change the positive integer to its negative

• Both A and B

• Add the absolute values

If yesterday's high temperature was -2°F and today's high is 16°F colder, what is today's high temperature?

• -14°F

• -18°F

• -20°F

• -22°F

When subtracting integers, what do you do after changing the subtraction to addition?

• Subtract the integers directly

• Add the integers directly

• Change the positive integer to negative

• Change the negative integer to positive

In the temperature example, what is the result of -2 + (-16)?

• -14

• -16

• -18

• -20

The temperature in Whitehorse, Canada, was -12°C in the afternoon. After the sun went down, it dropped 7°C. What is the new temperature?

• -19°C

• -20°C

• -18°C

• -17°C

In the Whitehorse example, what is the result of -12 + (-7)?

• -20

• -19

• -18

• -17

Victoria's bank account balance was -$17. She bought a candy bar for $2. What is her updated account balance?

• -$19

• -$21

• -$17

• -$15

Elizabeth had -3 points at the end of the first round of a trivia game. In the second round, she lost 12 points. What is her score at the end of the second round?

• -10 points

• -18 points

• -15 points

• -12 points

In the trivia game example, what is the result of -3 + (-12)?

• -10

• -12

• -15

• -18