Adding & Subtracting Integers

Which expression has a solution that is equal to zero?

• -4 - (-4)

• 7 - (-7)

• -3 - 3

• -1 + (-1)

Which expression has a solution that is NOT equal to zero?

• 1 - 1

• -3 + 3

• 5 - (-5)

• -8 - (-8)

Match the scenario with the equation used to find the CHANGE in each player's score.

• -7 - (5) = -12

• Start: -5

  End: -7

• 7 - 5 = 2

• Start: -5

  End: 7

• 7 - (-5) = 12

• Start: 5

  End: -7

• -7 - (-5) = -2

• Start: 5

  End: 7

Jason earned $20 at work. His account balance was -$15. Write an equation to find his current account balance. Do not use any spaces in your answer.

Mathematical Equivalence

ON

In round 2 on 99 math, Susan answers 10 questions incorrectly and 12 questions correctly. Write an equation to find the number of points she earns. Do not use any spaces in your answer.

Mathematical Equivalence

ON

Larry withdrew $40 from his bank account. His starting balance was $30. Write an equation to find his current account balance. Do not use any spaces in your answer.

Mathematical Equivalence

ON

Match each expression to it's value.

• 12

• 6 - (-6)

• 0

• -6 - (-6)

• -12

• -6 - 6

Match each expression to it's value.

• 8

• -5 - 3

• -8

• 5 - (-3)

• 2

• 5 + (-3)

• -2

• -5 + 3

The diver began recording a video at an elevation of -50 and ended at 75 feet below sea level. Write an equation to find the change in the diver's elevation.

• -50 - 75 = -125

• -75 - (-50) = -25

• -50 - (-75) = 25

• -50 + 75 = 25

The temperature was 5 degrees in the morning and dropped to -8 degrees overnight. Write an equation to find the change in the temperature.

• -8 - 5 = -13

• 5 - (-8) = 13

• 5 - 8 = -3

• -5 + 8 = 3