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Question (31)

QN0015180

Which expression equals 45 + (18 – 7)?

(A) 45 + 18 + 7
(B) 45 – 18 + 7
(C) 45 + 18 – 7
(D) 45 – 18 – 7

Correct Answer: C

Explanation:

A bracket preceded by + can be removed without changing signs.

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Question (32)

QN0015181

The value of 90 – (25 + 15) + 10 is:

(A) 50
(B) 55
(C) 60
(D) 65

Correct Answer: C

Explanation:

90 – 40 + 10 = 60.

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Question (33)

QN0015182

Which expression is equivalent to 100 – (30 – 20)?

(A) 100 – 30 + 20
(B) 100 + 30 – 20
(C) 100 – 30 – 20
(D) 100 + 30 + 20

Correct Answer: A

Explanation:

Removing brackets changes –20 to +20.

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Question (34)

QN0015183

Evaluate: 100 – (30 – 20)

(A) 80
(B) 85
(C) 90
(D) 95

Correct Answer: C

Explanation:

100 – 10 = 90.

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Question (35)

QN0015184

Which statement best explains why brackets are used in complex expressions?

(A) To increase numbers
(B) To reduce numbers
(C) To indicate the order of evaluation clearly
(D) To avoid multiplication

Correct Answer: C

Explanation:

Brackets help determine which operations should be performed first.

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Question (36)

QN0015185

Which expression is NOT equal to 50 – (12 + 8)?

(A) 50 – 12 – 8
(B) 50 + (–12 – 8)
(C) 50 – 12 + 8
(D) 30

Correct Answer: C

Explanation:

50 – 12 + 8 = 46, while the others equal 30.

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Question (37)

QN0015186

The value of 72 – (18 + 14) is:

(A) 38
(B) 40
(C) 42
(D) 44

Correct Answer: B

Explanation:

72 – 32 = 40.

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Question (38)

QN0015187

Which expression has the same value as 64 + (–20 – 5)?

(A) 64 – 20 – 5
(B) 64 + 20 – 5
(C) 64 – 20 + 5
(D) 64 + 20 + 5

Correct Answer: A

Explanation:

Adding negative numbers is equivalent to subtraction.

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Question (39)

QN0015188

A shopkeeper records profit as 150 + (40 – 15). The value of the expression is:

(A) 165
(B) 170
(C) 175
(D) 180

Correct Answer: C

Explanation:

150 + 25 = 175.

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Question (40)

QN0015189

Which of the following correctly removes brackets from 85 – (20 – 7 + 3)?

(A) 85 – 20 – 7 + 3
(B) 85 + 20 – 7 + 3
(C) 85 – 20 + 7 – 3
(D) 85 + 20 + 7 + 3

Correct Answer: C

Explanation:

Every sign inside the bracket changes when preceded by a minus sign.

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Question (31)

Which expression equals 45 + (18 – 7)?

Explanation:

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Question (32)

The value of 90 – (25 + 15) + 10 is:

Explanation:

Link:

Question (33)

Which expression is equivalent to 100 – (30 – 20)?

Explanation:

Link:

Question (34)

Evaluate: 100 – (30 – 20)

Explanation:

Link:

Question (35)

Which statement best explains why brackets are used in complex expressions?

Explanation:

Link:

Question (36)

Which expression is NOT equal to 50 – (12 + 8)?

Explanation:

Link:

Question (37)

The value of 72 – (18 + 14) is:

Explanation:

Link:

Question (38)

Which expression has the same value as 64 + (–20 – 5)?

Explanation:

Link:

Question (39)

A shopkeeper records profit as 150 + (40 – 15). The value of the expression is:

Explanation:

Link:

Question (40)

Which of the following correctly removes brackets from 85 – (20 – 7 + 3)?

Explanation:

Link:

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