Integer Addition with Two Color Counters

What can be added to these counters to make zero?

• One red counter

• Two yellow counters

• Two yellow counters and one red counter

• Two red counters

Use the counters to find the sum of the integers. 

• 17

• -2

• -1

• -17

#1 Hello World

• 7

• 5

• -7

• -5

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 equation represents the 2-color counters shown in the image? (Yellow is Positive and Red is Negative)

• -4 + 5 = -1

• 4 + 5 = 9

• 4 + (-5)= -1

• -5 - 4 = -9

Which equation represents the 2-color counters shown in the image?(Note:  Red is negative; yellow is positive.)

• 4 + 1 = 5

• 4 + (-1) = 5

• 4 + (-1) = 3

• -4 + 1 = -3

• -4
• 10
• 3
• 4

• A
• B
• C
• D

Which expression has the sum of 0?

• 0 - 8

• 0 + -8

• -8 - 8

• 8 + (-8)

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