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Question (21)

QN0030233

To find (+7) − (+18) using the token model, you start with 7 positive tokens. How many zero pairs must be added to be able to remove 18 positives?

(A) 7
(B) 11
(C) 18
(D) 25

Correct Answer: B

Explanation:

You need 18 positives total to remove. You already have 7, so 18 − 7 = 11 zero pairs must be added

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Question (22)

QN0030234

What is the result of 7 − 18 using the token model?

(A) 25
(B) 11
(C) −11
(D) −25

Correct Answer: C

Explanation:

After removing 18 positives from the 18 available, 11 negatives remain giving −11

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Question (23)

QN0030235

Subtracting a number is the same as:

(A) Multiplying by its reciprocal
(B) Adding its additive inverse
(C) Dividing by itself
(D) Adding the same number again

Correct Answer: B

Explanation:

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Question (24)

QN0030236

What is the additive inverse of 18?

(A) 1/18
(B) 18
(C) 0
(D) −18

Correct Answer: D

Explanation:

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Question (25)

QN0030237

Using the rule that subtracting equals adding the additive inverse, 7 − 18 can be written as:

(A) 7 + 18
(B) 7 × (−18)
(C) 7 + (−18)
(D) −7 + 18

Correct Answer: C

Explanation:

Additive inverse of 18 is −18, so 7 − 18 = 7 + (−18)

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Question (26)

QN0030238

The additive inverse of −12 is:

(A) −12
(B) 12
(C) 1/12
(D) 0

Correct Answer: B

Explanation:

−(−12) = 12

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Question (27)

QN0030239

Using the additive inverse rule, 4 − (−12) is equal to:

(A) 4 − 12
(B) −4 + 12
(C) 4 + 12
(D) −4 − 12

Correct Answer: C

Explanation:

Subtracting −12 means adding its additive inverse which is 12, so 4 − (−12) = 4 + 12

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Question (28)

QN0030240

The additive inverse of an integer 'a' is represented as:

(A) a
(B) 1/a
(C) −a
(D) a²

Correct Answer: C

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Question (29)

QN0030241

What is −(−18)?

(A) −18
(B) 0
(C) 18
(D) 36

Correct Answer: C

Explanation:

The additive inverse of −18 is −(−18) = 18

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Question (30)

QN0030242

A coin starts at 0 and makes three movements: +3, −7, +5. What is the final position?

(A) 15
(B) −5
(C) 1
(D) −1

Correct Answer: C

Explanation:

3 + (−7) + 5 = 1

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Question (21)

To find (+7) − (+18) using the token model, you start with 7 positive tokens. How many zero pairs must be added to be able to remove 18 positives?

Explanation:

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Question (22)

What is the result of 7 − 18 using the token model?

Explanation:

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Question (23)

Subtracting a number is the same as:

Explanation:

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Question (24)

What is the additive inverse of 18?

Explanation:

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Question (25)

Using the rule that subtracting equals adding the additive inverse, 7 − 18 can be written as:

Explanation:

Link:

Question (26)

The additive inverse of −12 is:

Explanation:

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Question (27)

Using the additive inverse rule, 4 − (−12) is equal to:

Explanation:

Link:

Question (28)

The additive inverse of an integer 'a' is represented as:

Explanation:

Link:

Question (29)

What is −(−18)?

Explanation:

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Question (30)

A coin starts at 0 and makes three movements: +3, −7, +5. What is the final position?

Explanation:

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