Integers Quiz

The sum of a number and its ________ is zero.

• Identity

• Inverse

• Commutative

• Closure

What is the additive inverse of −15 ?

• 0

• 1

• 15

• −15

Which of the following on simplification is not negative?

• −8−(−4)

• 7+(−11)

• −2+(−8)

• −10−(−12)

What is the additive identity of 6?

• 6

• 0

• −6

• 1

Which integer is the smallest? −8, 0, 4, 9, −11, 6, 19, −27, 5

• −27

• −8

• 19

• 0

Find the value of:

a) (−37) − (−15) − 2 = _______

b) 6 − (−2) − 5 = ________

Write a negative integer and a positive integer whose difference is −3.

Compare: a) (−1) + (−5), (−7) − (−5)

b) 6 − (−2) + 4, (−1) − (−2) − 3

Assertion (A): The temperature 0°C is hotter than the temperature −5°C. Reason (R): Every negative integer is less than 0.

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true and R is false.

• A is false and R is true.

In a math quiz 1 mark is given for each correct answer and 1 mark is deducted for each wrong answer. There are 20 questions. If all questions are answered correctly, the student’s score will be 20, if all questions are answered incorrectly, the student’s score will be -20. Part way through this quiz, Udita has a score of 2. What will her new score be if she:

a) answers the next five questions correctly?

b) answers the next five questions incorrectly?

c) answers 2 of the next five questions correctly and 3 of them incorrectly?

d) answers 4 of the next 5 questions incorrectly and 1 of them correctly?