Adding Integers Using Counters

What does it mean to add a positive integer?

• Moving to the left on the number line.

• Moving to the right on the number line.

• Staying in the same position on the number line.

• Moving up on the number line.

What happens when you add a positive integer and a negative integer?

• You find the sum of their absolute values and take the sign of the positive integer.

• You find the difference between their absolute values and take the sign of the number with the larger absolute value.

• The result is always a positive integer regardless of the values.

• The result is always a negative integer regardless of the values.

What is the result for the counter model with 2 red counters and 5 red counters?

• -5

• -7

• 3

• 7

What does it mean to add a negative integer?

• It means moving to the right on the number line.

• It means moving to the left on the number line.

• It means increasing the value of the number.

• It means decreasing the value of the number by a positive integer.

What is the identity property of addition?

• Adding one to any number results in the same number.

• Adding zero to any number does not change the number.

• The sum of any two numbers is always greater than either number.

• Subtracting a number from itself results in zero.

What is an integer?

• A whole number that can be positive, negative, or zero.

• A number that includes fractions and decimals.

• A number that is always positive.

• A number that represents a part of a whole.

Which addition equation matches the problem modeled with 2 yellow counters and 4 red counters?

• 2 + -4 = -2

• 2 + 4 = 6

• 2 - 4 = -2

• 2 + 4 = 2

If you have 3 yellow counters and 5 red counters, what is the result?

• -2 (3 + -5 = -2)

• 2 (3 + 5 = 8)

• 8 (3 + 5 = 8)

• -8 (3 - 5 = -2)

What do you get when you add opposites?

• One

• Negative One

• Zero

• Two

What is the result of 8 + (-2)?

• 4

• 6

• 8

• 10