試題詳解

16. Olivia added the prices for the MP3 player, the headphones and the speakers on her calculator. The answer she got was 248.  Olivia’s answer is incorrect. She made one of the following errors. Which error did she make?

(A)She added one of the prices in twice.
(B)She forgot to include one of the three prices.
(C)She left off the last digit in one of the prices.
(D)She subtracted one of the prices instead of adding it.