To spell ordinal numbers, just add -th to cardinal numbers, such as fourth and sixteenth. There are exceptions: first, second, third, fifth, eighth, ninth, and twelfth. When expressed as figures, the last two letters of the written word are added to the ordinal number.

Play all the numbers and repeat three times. Listen and improve listening comprehension.

In compound ordinal numbers, only the last figure is written as an ordinal number. For example, twenty-first (21st), thirty-fifth (35th). As to numbers 20-90, remove the y, and add -ieth for ordinal numbers.