Adding Integers

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

• -2 + -4 = -6

• 2 + -4 = -2

• 4 + 2 = 6

Which counter set models the expression -4 + 5?

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What is a zero pair? 

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

What equation is modeled?

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

What number does this represent?

• 0

• 2

• -1

• -2

Solve:

23 + -11

• -12

• 12

• 34

• -34

8 + (-2)

A football team gained 9 yards on one play and then lost 22 yards on the next. Write a sum of integers to find the overall change in field position.

• -9 + (-22) = -13
• 9 + (-22) = 13
• 9 + (-22) = -13
• none

At 2pm, the temperature was 15 degrees. By midnight, the temperature dropped by 30 degrees. What is the temperature at midnight?

• 45 degrees
• -45 degrees
• 15 degrees
• -15 degrees

33 + (-38)

• -5
• 5
• 71
• -71