What is the sum of 765 and 549?

• A. 1313
• B. 1310
• C. 1315
• D. 1314

Answer: (D)

This tests adding multi-digit numbers using place value and carrying. Start with the units: 5 plus 9 equals 14, so write down 4 and carry 1 to the tens. In the tens place, 6 plus 4 plus the carried 1 equals 11, write down 1 and carry 1 to the hundreds. In the hundreds place, 7 plus 5 plus the carried 1 equals 13, which gives 3 in the hundreds place and a carry of 1 to the thousands place. That carried 1 becomes the thousands place, so the full number is 1,314. You can also see it as (700 + 60 + 5) + (500 + 40 + 9) = 1200 + 100 + 14 = 1314. The sum is 1314.