To find averages, you add all the numbers given and divide by the numbers given. (325 + 332 + 345) / 3 = 334. Your answer is 334.
345 + 890 + 549 = 1784
2 + 345 = 347
200 + 345 = 545
345 + 67797808 = 67798153
345 + 253 = 598
345 + 890 = 1235
55555555 + 345 = 55555900
345 + 435 = 780
345656 + 345 = 346001
1 + 55 + 345 + 87 + 98 = 586
345 + 69 = 414