Here is an example timetable for the Cork to Dublin line. A family wants the 07:00 train from Cork. It reaches Dublin Heuston at 09:35.

How long is that journey? Take a good look before anyone answers.

Watch three journeys on the timetable. For each one, find the depart cell and the arrive cell, then count up from one to the other.

Notice how we bridge through the whole hour. First count the minutes up to the next full hour. Then count the whole hours. Then add the last few minutes.

This last one is a shorter hop that stays inside one hour. Watch how the count-up works when there is no whole hour to bridge.

Today we work through these journeys on the timetable together. We will tap the depart cell, then the arrive cell, and read off how long the journey takes:

• Cork (Kent) to Heuston on the 07:00 service (bridges two whole hours).
• Mallow to Heuston on the 09:00 service (bridges two whole hours).
• Thurles to Portlaoise on the 11:00 service (stays inside one hour).
• Cork (Kent) to Thurles on the 07:00 service (bridges one whole hour).

Each journey is a different length, so watch how the count-up changes.

Today we work through these timetable questions together. Each one names a journey to find and a journey time to check:

• Find the 07:00 Cork to Heuston journey.
• Find the Mallow to Portlaoise hop on the 09:00 service.
• Find the Limerick Junction to Heuston leg on the 11:00 service.
• Confirm the Cork to Heuston time on the 11:00 service, then compare it with the 07:00 service. Do you notice anything?

We move from a whole journey, to a short hop, to a middle leg, then back to comparing two full journeys.