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Quiz Chapter 5: Algebraic Expressions

10 questions · Form 1 Mathematics Bab 5: Algebraic Expressions

Question 1 of 10Score: 0

Simplify: 2(3a + 4) + 3(a - 1)

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Simplify: 2(3a + 4) + 3(a - 1)

  1. 9a + 5
  2. 9a + 11
  3. 5a + 5
  4. 9a + 7
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Answer: A

Expand: 6a + 8 + 3a - 3 = (6a + 3a) + (8 - 3) = 9a + 5.

2. Simplify: -4(2x - 3y)

  1. -8x + 12y
  2. -8x - 12y
  3. 8x - 12y
  4. -8x + 3y
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Answer: A

(-4) x (2x) + (-4) x (-3y) = -8x + 12y.

3. Which of the following is UNLIKE to 4x2y?

  1. 4xy2
  2. -2x2y
  3. x2y
  4. 12 x2y
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Answer: A

In 4xy2, y is squared instead of x, making it an unlike term compared to 4x2y.

4. A pen costs RM x and a notebook costs RM y. Write an expression for the total cost of 3 pens and 2 notebooks.

  1. 3x + 2y
  2. 2x + 3y
  3. 5xy
  4. 6xy
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Answer: A

3 pens cost 3x and 2 notebooks cost 2y. Total cost = 3x + 2y.

5. Simplify: 5x + 3y - 2x + 4y

  1. 3x + 7y
  2. 7x + 7y
  3. 3x - y
  4. 8x + 7y
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Answer: A

Group like terms: (5x - 2x) + (3y + 4y) = 3x + 7y.

6. Express the phrase '5 more than twice a number x' as an algebraic expression.

  1. 2x + 5
  2. x2 + 5
  3. 5x + 2
  4. 2(x + 5)
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Answer: A

'Twice a number x' is 2x. '5 more than' means adding 5, giving 2x + 5.

7. Simplify: 15x2y ÷ 3xy

  1. 5x
  2. 5y
  3. 5xy
  4. 3x
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Answer: A

15x2y3xy = (153) x (x2/x) x (yy) = 5 x x x 1 = 5x.

8. Find the product of 4m and -3n.

  1. -12mn
  2. 12mn
  3. -7mn
  4. 1mn
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Answer: A

4m x (-3n) = (4 x -3) x m x n = -12mn.

9. Simplify: 24a3b2 ÷ 8ab

  1. 3a2b
  2. 3ab
  3. 3a2
  4. 16a2b
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Answer: A

(248) x (a3/a) x (b2/b) = 3a2b.

10. An adult ticket for a museum costs RM a and a child ticket costs RM b. If a family buys 2 adult tickets and 3 child tickets and pays with a RM50 note, write an expression for their change.

  1. 50 - 2a - 3b
  2. 50 - 2a + 3b
  3. 2a + 3b - 50
  4. 50 - 5ab
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Answer: A

Total ticket cost = 2a + 3b. Change = 50 - (2a + 3b) = 50 - 2a - 3b.

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