Question

Visualize the following using a number line, add $-6$ to $7$ and then subtract $-8$ from the result.​

• A. $7$
• B. $-7$
• C. $9$
• D. $10$

Answer 1

The correct option is C $9$

According to the question: ​
We have to add $-6$ to $7$ and then subtract $-8$ from the result, which means:​
$⟹7+(-6)=+1$​
$⟹1-(-8)=9$
Let’s try to visualize this on a number line

Stand on $7$ on the number line, then move $6$ places to the left in order to add $-6$ to $7$. You will reach $1$.​
Now, move $8$ places to the right to subtract $-8$ from $1$. You will reach $9$, i.e.,​
$1-(-8)=1+8=9$