Question

Which expression has the same value as the one below?

8 + [4 + (–9)]

A. 12 + (–9)
B. –12 + 9
C. –4 + (–9)
D. 4 + (–9)

Answer 1

8 + [4+(-9)] = 3
A. 12 + (-9) = 3
Therefore the correct answer is A. 12 + (-9)

Answer 2

Option A is correct

`12+(-9)`

Explanation:

Using associative property:

`a+(b+c) =(a+b)+c` for any values of a, b and c

Given the expression:

8 + [4 + (–9)]

Apply the associative property we have;

`[8+4]+(-9)`

then;

`12+(-9)`

Therefore, the expression has the same value as 8 + [4 + (–9)] is,
`12+(-9)`