Integer Operations Number Lines Color Counters

Step 1: Add your numbers
Step 2: Keep your signs
These steps apply to which rule?

• Adding Integers Rule (for same signs)
• Subtracting Integers Rule (for same signs)
• Multiplying Integers Rule (for same signs)
• Dividing Integers Rule (for same signs)

Negative + Negative = ??

• Positive
• Negative
• It Depends

Use the number line to find the sum.
3 + (-12) =

• -9
• 9
• -15
• 15

What equation is modeled?

• 15 + 25 = -10
• 15 + -25 = -10
• -10 + 15 = -10
• -25 + 15 = -10

• 7
• 5
• -7
• -5

Which number is an example of an integer?

• 1/8

• .39

• -7

• 8.3

• -3 +7 = 10
• 7 + (-3) = 4
• 7 + (-10) = -3
• 10 + (-3) = 7

• -5 + 3 = -2
• 5 + (-3) = 2
• 5 + 3 = 8
• -5 + (-3) = -8

• 4 + 3 = 1
• 4 + (-3) = 1
• -4 + 3 = -1
• -4 + (-3) = -1

Look at the number line.

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