Negative Numbers and Integers

Result

Negative Numbers and Integers - 1

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Question 1
1 / -0

What is the value of the expression [18 − (−7) + (−2) − (+ 8)]?

A
−18

B
−15

C
15

D
18

Solution

The given expression is [18 − (−7) + (−2) − (+ 8)].

When we subtract an integer from another integer, the additive inverse of the integer that is being subtracted must be added to the other integer.

Therefore, the value of the given expression can be calculated as

= 18 + (Additive inverse of −7) − 2 − 8

= 18 + 7 − 2 − 8

= 25 − 10

= 15

Thus, the value of the given expression is 15.
Question 2
1 / -0

Which of the following statements is incorrect?

A
The predecessor of 0 is −1.

B
The successor of −5 is −4.

C
Integers are finite in number.

D
All whole numbers are integers.

Solution

Integers are infinite in number.

Thus, the statement given in alternative C is incorrect.