What is a zero pair? 

• Two negatives
• Two positives
• One negative, one positive

Which addition equation matches the problem modeled below? (Yellow is positive and Red is negative)

• -2 + -4 = -6

• 2 + -4 = -2

• 4 + 2 = 6

• -7 + 4 = -3
• 7 + (-4) = 3
• 7 - 4 = 11
• 7 + (-4) = -11

Which expressions represents the 2-color counters shown in the image?

• -4 + 5

• 4 + (-5)

• -4 + (-5)

• -5 + 4

Which problem can this represent if yellow is positive?

• 5 + -2 = -3

• -5 + 2 = 7

• 5 + -2 = 3

Find the sum of the integer model shown.

• -5 + 3 = -2

• 5 + (-3) = 2

• 5 + 3 = 8

• -5 + (-3) = -8

Which expression matches the model shown?

• -4 + 5

• 4 + 5

• 4 + (-5)

• -4 + (-5)

Which equation does the model show?

• 5 + 2 = 7

• -5 + 2 = 3

• 5 + (-2) = 3

• -5 + 2 = -7

Which equation represents the counter model?

• 4 + 1 = 5

• 4 - (-1) = 5

• 4 + -1 = 3