Modeling Adding and Subtracting Integers

-5 - 4 = -1

• -5 - 4 = -1

• -5 + 1 = -1

• -5 + 4 = -1

• 5 + (-4) = 1

• 4 - 2 = 2
• -4 + 2 = -2
• -4 - 2 = -6
• 4 + 2 = 6

• -15 - 5 = -10
• -15 - 5 = -20
• 15 - 5 = 20
• -15 - (-5) = -20

Look at the number line.

• –2 + 4 =  –2

• –2 + (–4) =  –6

• 4 + (–6) =  –2

• 4 + (–2) =  6

Choose the equation that best represents the model.

• 2 + (–6) =  –4

• 0 – 6 = –6

• –6 + 8 = 2

• 8 + (–6) = 2

Which addition equation matches the problem modeled below?

• -6 + (-9) = 3

• -6 + 9 = 3

• -6 + 3 = 9

• 9 + (-3) = -6

What is a zero pair? 

• Two negatives

• Two positives

• One negative, one positive

Which equation matches the number line model?

• -4 + (-6) = -10

• 4 + (-6) = -2

• -4 + 6 = 2

• 4 + 6 = 10

Which number line models the expression -2 + 4?

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Which number line models the expression 4 + (-5)?

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