Use the fingering chart to help you.
You will need to be able to play these scales from memory, both tongued and slurred for your exam.
Warm-ups for each scale can be found in the Grade 1 warm-ups page.
Below are performances of all of the Grade 1 pieces. At the bottom of the page is a link to the ABRSM "Practice Partner" app.
You might find it useful to have a look below at the marking criteria for ABRSM Saxophone exams.