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Quiz Chapter 1: Rational Numbers

10 questions · Form 1 Mathematics Bab 1: Rational Numbers

10 questions · plays in fullscreen

Full Question List & Answer Key

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

1. A submarine is 25 m below sea level. It descends another 15 m and then rises 10 m. What is its final depth?

  1. -30 m
  2. -50 m
  3. -20 m
  4. -40 m
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Answer: A

Represent sea level as 0: Initial = -25. Descends 15: -25 - 15 = -40. Rises 10: -40 + 10 = -30 m.

2. Which decimal has the smallest value?

  1. -4.82
  2. -4.28
  3. -0.82
  4. -0.28
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Answer: A

On a number line, -4.82 lies furthest to the left, making it the smallest.

3. Calculate: -3.2 x 0.5 + 1.8

  1. 0.2
  2. -0.2
  3. 3.4
  4. -3.4
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Answer: A

First, (-3.2) x 0.5 = -1.6. Then, -1.6 + 1.8 = 0.2.

4. The temperature at midnight was -4°C. By 8:00 AM, it rose by 9°C. What was the temperature at 8:00 AM?

  1. 5°C
  2. -13°C
  3. 13°C
  4. -5°C
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Answer: A

-4 + 9 = 5°C.

5. If a = -3 and b = 4, calculate the value of 2a - 3b.

  1. -18
  2. -6
  3. 6
  4. 18
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Answer: A

2(-3) - 3(4) = -6 - 12 = -18.

6. Evaluate: (-12) ÷ (-34)

  1. 23
  2. -23
  3. 38
  4. -38
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Answer: A

(-12) x (-43) = 46 = 23.

7. Calculate: -6 x (-5) ÷ (-2)

  1. -15
  2. 15
  3. -30
  4. 30
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Answer: A

First, (-6) x (-5) = 30. Then, 30 ÷ (-2) = -15.

8. A trader suffers a loss of RM120 on Monday, makes a profit of RM250 on Tuesday, and a loss of RM80 on Wednesday. What is the net outcome?

  1. Profit of RM50
  2. Loss of RM50
  3. Profit of RM210
  4. Loss of RM210
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Answer: A

-120 + 250 - 80 = +50 (Profit of RM50).

9. Which law of arithmetic is illustrated by: 5 x (10 + 2) = (5 x 10) + (5 x 2)?

  1. Distributive Law
  2. Commutative Law
  3. Associative Law
  4. Identity Law
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Answer: A

The Distributive Law states that a x (b + c) = (a x b) + (a x c).

10. Evaluate: -13 + 56 - (-12)

  1. 1
  2. 0
  3. 23
  4. -1
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Answer: A

Common denominator is 6: -26 + 56 + 36 = 66 = 1.

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