Question
Zoey put 644 buttons in three boxes C, D and E. Box C and Box D contained a total of 372 buttons. Box D and Box E contained a total of 540 buttons. How many buttons were there in Box C and Box E altogether?


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Zoey put 644 buttons in three boxes C, D and E. Box C and Box D contained a total of 372 buttons. Box D and Box E contained a total of 540 buttons. How many buttons were there in Box C and Box E altogether?