Counts around six hundred
Whole supplied source
Fictional quantity card set: Counts around six hundred. First card states 590 labels; second card states 600 labels; third card states 610 labels. These are stated counts of the same kind of label, not observed stocks, money, distances or prices. The supplied number-line ticks 590,600,610,620 are equal ten-label intervals. The task is to represent, compare or order these stated quantities and give a checking reason.
Your useful job
Make a useful quantity guide. Keep the whole quantity and the value of each digit clear.
Own representations, checking explanation and any actual stock remain open.