Sum Fun! mixes bingo with math problems and is for ages 4-8. It is played more-or-less the same as Bingo without the use of bingo balls. Instead, cards are drawn with a mathematical equation on them and the player must figure out the answer and mark it correctly on their own board. When someone gets four in a row correct in any direction, they are the winner. This is a simplified version of Smarty. —user summary

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