Modeling Adding and Subtracting Integers

• 4 + 2 = 6
• -4 + 2 = -2
• 4 + (-2) = 2
• -4 + (-2) = -6

• 1 + 5 = 6
• -1 + 5 = 4
• 1 + (-5) = -4
• -1 + (-5) = -6

• -4 + 5
• 4 + 5
• 4 + (-5)
• -4 + (-5)

• 8 + (-5) = 3
• -8 + 5 = -3
• 8 + 5 = 13
• -8 + (-5) = -13

Coach Bob’s football team lost 8 yards, gained 5 yards, and lost 2 yards on their first 3 plays from the line of scrimmage.
The team’s current position is ​​ (a)   yards relative to the original line of scrimmage.
The additive inverse,​ (b)   represents the number of yards the team needs to gain in order to return to the original line of scrimmage.

• -5

• 5

• 15

• -15

What problem and answer are modeled?

• -15 - 5 = -20

• -5(4) = -20

• -10(2) = -20

• -15 + 5 = -10

Coach Bob’s football team lost 8 yards, gained 5 yards, and lost 2 yards on their first 3 plays from the line of scrimmage.
The team’s current position is ​​ (a)   yards relative to the original line of scrimmage.
The additive inverse,​ (b)   represents the number of yards the team needs to gain in order to return to the original line of scrimmage.

• -5

• 5

• 15

• -15

-12 - 12 =

• 0

• -24

• -20

• 24

(-13) + 8 =

• 4

• -5

• -4

• 5

Match

• 11

• 24 - (-5)

• -216

• 72(-3)

• 29

• -3 + 14

• 12

• 18 + (-6)

• 3

• -7 - (-10)