Elaine had 5 buttons and her grandmother donated 5 cards of buttons to the collections. elaine sorted the buttons into 5 piles, putting 8 buttons in each pile. how many buttons were on each card from elaine's grandmother?

There were 7 buttons on each card from Elaine's grandmother

In total, there were 40 buttons since there were 5 piles of 8 buttons. Because Elaine had 5 buttons in the pile the other 35 were her grandmother's buttons. If each of the 5 cards had the same number of buttons on them then there would be 7 buttons on each card.

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