Adding two positive integers results into an answer which is positive

Explanation

We can use the number line to explain addition of integers. For example, to find 4 + 3, we begin at 0 and draw an arrow 4 units long that points to the right. It represents positive 4. From the tip of that arrow, we draw a second arrow, 3 units long, that points to the right. It represents positive 3. Since we end up at 7, it follows that 4 + 3 = 7.