For staccato practice select a major scale you are comfortable with. For most instruments (keyboard, guitar, trumpet) this will be the C major scale.
Woodwind instrument players choose a scale which covers both sides of the break on your instrument. Saxophones and flutes use for example the G major scale. Clarinets used the C major scale. (When your staccato technique starts to get together within this range select a scale covering the more demanding areas in the lower or higher registers.)
Play Exercise 1 first without a metronome at a slow tempo and listen carefully for the four points outlined above. The following day play the same exercise, this time with a Metronome at a moderate tempo like MM = 60. Alternate between the two approaches for following practice sessions.