Story words that tell us more are coming: more, came, joined, got, in all, altogether.
Story words that tell us some are going away: left, ate, flew away, went home, popped, melted.
Grown-up: You can show how grown-ups write these stories, like 3 + 2 = 5 and 5 β 1 = 4 (see Number Facts to 5). In Kindergarten, acting out with materials and talking is the main thing.