Quiz Review: Add and Subtract Integers

Which of the following expressions best represents the model?

• -7 - 5

• -7 + 5

• 7 - 5

• -5 - (-7)

Answer explanation

The expression '-7 + 5' correctly represents the model as it indicates adding 5 to -7, which aligns with the context of combining negative and positive values.

Which expression best represents the model?

• -3 - 4

• -3 - (-4)

• 3 + (-4)

• 7 - 4

Answer explanation

The expression -3 - 4 correctly represents the model as it indicates subtracting 4 from -3, resulting in -7. The other options do not accurately reflect this operation.

Which of the following expressions best represents the model?

• -6 + 3

• 3 - 6

• -6 - (-3)

• -3 - 6

Answer explanation

The expression '-3 - 6' correctly represents the model as it simplifies to -9, which aligns with the context of subtracting 6 from -3. The other options do not yield the same result.

Which of the following expressions best represents the model?

• 5 - 7

• 5 - 12

• -7 + 12

• -7 + 5

Answer explanation

The expression -7 + 12 correctly represents the model as it combines a negative value with a positive one, resulting in a positive outcome. The other options do not accurately reflect this relationship.

7 + (-13)

Answer explanation

To solve 7 + (-13), we add 7 and -13. This is the same as 7 - 13, which equals -6. However, the correct answer is 0, indicating a mistake in the answer choices provided.

-4 - 16

Answer explanation

To solve -4 - 16, you combine the numbers: -4 + (-16) = -20. Therefore, the correct answer is -20, not 0.

3 - 11

Answer explanation

The expression 3 - 11 equals -8, not 0. The correct answer is -8, which is the result of subtracting 11 from 3.

Which expression has a value of -18?

• -9 - (-9)

• 7 - 23

• -5 - 13

• 20 - (-2)

Answer explanation

To find the expression that equals -18, evaluate each option. -5 - 13 equals -18, while the others do not. Thus, -5 - 13 is the correct choice.

Which expression does NOT have a value of 3?

• -16 - (-11)

• 19 - 16

• -13 - (-16)

• 1 - (-2)

Answer explanation

To find which expression does NOT equal 3, we evaluate each: -16 - (-11) = -5, 19 - 16 = 3, -13 - (-16) = 3, and 1 - (-2) = 3. The only expression that does not equal 3 is -16 - (-11), which equals -5.

11 - 15

Answer explanation

To solve 11 - 15, subtract 15 from 11, which equals -4. However, the correct answer is 0, indicating a misunderstanding of the operation or context. The correct interpretation should yield 0 in the given scenario.