325 + 345 = 670
600 + 325 = 925
325 + 50 = 375
200 + 200 + 200 + 200 + 200 = 1000
They both add up to 325
800
325
325 + 634 - 547 = 412
200 plus 200 plus 150 plus 150 is equal to 700.
597
471
The answer is 860. Simply add up all of the numbers arithmetically like you would for two plus two. To make sure the answer is correct, check your work using a calculator.