We want to find the sum and use the number line to verify our answer. Let's look at the given expression!
3+ 12
Now, we can find the sum of two numbers with the same sign. Recall that we can do so by adding their absolute values. Let's do it!
Recall that both numbers are positive. This means that the sum is also a positive number, 15.
Checking Our Answer
Checking Our Answer
We will check our solution, just to be sure. To do so, we will represent the situation on the number line.
Looking at the diagram, we can see that the top arrow ends at 15. This means that the result of adding 12 to 3 is equal to 15. Therefore, our answer is correct.
