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

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

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

• -14

• -16

• -18

• -20

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

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

• -20

• -19

• -18

• -17

Tags

CCSS.7.NS.A.1C

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

• -$19

• -$21

• -$17

• -$15

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

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

• -10

• -12

• -15

• -18

Tags

CCSS.7.NS.A.1C