Question

5+(-7)=
a) -12
b) -2
c) 2
d) 12
e) none of these

Answer 1

-2

Explanation:

Our task is to add the integers:

`\twoheadrightarrow\quad\sf{5+(-7)}`

Recall that adding a negative is the same thing as subtracting a positive. So, you can think about this as subtracting positive 7 instead of adding negative 7.

`\twoheadrightarrow\quad\sf{5-7}`

Now, think of this as 7 - 5, which is 2. But now, remember about the order of the numbers. Originally, we had 5 - 7. So, we'll change the sign of our answer. We get:

`\twoheadrightarrow\quad\sf{-2}`

Answer 2

b) -2

Explanation:

5+(-7) = 5 - 7 = - 2

So, the answer is b) -2