Addition Equations with Models

What is the definition of a zero pair?

• Two negatives added together

• When you add zero and zero together

• A pair of numbers whose sum is zero

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

What makes a zero pair?

• circled boxes

• +1 and +1

• -1 and -1

• -1 and +1

Find the sum of the integer model shown.

• -2

• 2

• 8

• -8

Which expression matches the model shown?

• -4 + 5

• 4 + 5

• 4 + (-5)

• -4 + (-5)

What is the sum of the addition question represented by the counter model?

• -2

• 7

• -7

• 3

• +5 and -3

What is the sum of the addition questions represented by the counter model?

• 5

• -5

• 3

• -3