Заранее . listen and repeat. how do we form ordinal numbers? 1st=first 2nd=second 3rd=third 4th=fourth 5th=fifth 6th=sixth 7th=seventh 8th=eighth 9th=ninth 10th=tenth 11th=eleventh 12th=twelfth 13=thirteenth 14th=fourteenth 15=fifteenth 16th=sixteenth 17th=seventeenth 18th=eighteenth 19th=nineteenth 20th=twentieth