Step-by-step explanation: To find the next two terms in the pattern, begin by studying the pattern.
Notice that the difference between 320 and 410 is 90. In other words, 320 + 90 is 410. In the same way, 410 + 90 is 500. Continuing with the same pattern, 500 + 90 is 590 and 590 + 90 is 680.
Thus, the next two terms in the pattern are 590 and 680.
We can see that we add 90 to the original number we had to get our new number.