Questions about the resolution of digital pressure gauges

Detailed description of the problem: Digital pressure gauges 100kPa, 600kPa, grade 0.05 and grade 0.1, how to calculate the resolution, how many digits should be displayed?
The resolution of the digital pressure gauge is calculated according to the full scale. No matter what the resolution of the 0.05-level instrument, the display digits are 5 digits, while the 0.1 digits have changes in the display digits.
Take the digital pressure gauge of 0.05 grade and 100kPa as an example:
The allowable error is 100kPa × 0.05% = ± 0.05kPa. Then the resolution is 0.01kPa; if it is one-thousandth, then 100kPa × 0.1% = 0.1kPa. The display digits are all 5 digits. Because the digital pressure gauge of one-thousandth, if 4 digits are displayed, 0.1Pa cannot reflect the error, so 5 digits must be displayed.
If it is a 0.1-level, 600kPa digital pressure gauge:
Maximum allowable error 600kPa × 0.1% = ± 0.6kPa
From the above, the resolution of a 600 kPa, 0.1-level digital pressure gauge is 0.6 kPa; the display digits can be 4 digits.