What is 999.9 ÷ 33?

• A. 30.0
• B. 30.3
• C. 29.3
• D. 31.3

Answer: (B)

Dividing a decimal by a two-digit number is about how many times the divisor fits into chunks of the dividend. Start with a close multiple: 33 × 30 = 990, which is just under 999.9. Subtract to see what’s left: 999.9 − 990 = 9.9. Now determine how many times 33 fits into that remainder. Since 33 × 0.3 = 9.9, that adds 0.3 to the quotient. Put it together: 30 + 0.3 = 30.3. Therefore, the quotient is 30.3.