What is 57.00 plus 31.00?

• A. 88.00
• B. 88.50
• C. 87.50
• D. 88.25

Answer: (A)

When adding decimals, line up the decimal points and add each place value from right to left. Here both numbers have two digits after the decimal, which are zero. Add the ones and tens: 7 + 1 = 8 in the ones place, and 5 + 3 = 8 in the tens place. The decimal parts add to 0.00, so the total is 88.00.