Answer:
$18
Explanation:
First, let's add the prices of the items she wants to buy to find out the total amount of money she needs.
$9 + $12 + $3 = $21 + $3 = $24
The three items she wants to buy have a total cost of $24.
Now we use addition again to find out the amount of money she already has.
$5 + $1 = $6
She has saved $6 so far.
Now we use subtraction to find out the amount of extra money she needs.
$24 - $6 = $18
Answer: $18