reminder 285 You can use the number line to help you add! In which direction on the number line do positive numbers point? left right right Our arrow will be how many units long? 3 How do we draw an arrow representing 3? three units, facing left one more unit to the right three units, facing right three units, facing right How do we draw an arrow to represent subtracking 3? three units, facing left one more unit to the right three units, facing right three units, facing left