Answer:
462 + 393 = 855
Explanation:
break 462 into hundreds tens in ones do the same with 393. then add the ones together, 2 + 3 = 5. then the tens, 60 + 90 = 150. then the hundreds. 400 + 300 = 700. then assemble your final answer. 700 + 150 + 5 = 855.