Add it up: goal of add it up is to select numbers that add up to the target sum. you only have a limited amount of time to do so. the more numbers you select to get to the target sum, the higher your score will be. the faster you solve a sum, the higher your score will be. a mind games game.
neongames - Add up numbers to a given target sum by drawing a path over ..
neongames - Add up numbers to a given target sum. the more numbers you ..
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