Apineapple has 9 grams of sugar per slice. a watermelon has 18 grams of sugar per slice. which statement is true? clear check there is more sugar in a large pineapple than in a small watermelon. the amount of sugar in 2 slices of watermelon is 18 grams. for an equal number of slices, the watermelon will have twice as much sugar. for an equal number of slices, the watermelon will always have 9 more grams of sugar.