Objective: I know my ordinal numbers from eleventh to thirtieth.
Cardinal numbers tell "how many"
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Ordinal numbers tell "which one"
eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth, twentieth, twenty-first, twenty-second, twenty-third, twenty-fourth, twenty-fifth, twenty-sixth, twenty-seventh, twenty-eighth, twenty-ninth, thirtieth
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