asic Cardinal Numbers 4112 ☆13-19 -teen(13,15.18) 20,30,….90-y (20,30,40,50,80) ☆ double-digit“-”( hyphen) ☆ three-digit and (omitted in oral E except with single digit)Basic Cardinal Numbers ❖1-12 ❖13-19 - teen (13, 15. 18) ❖20, 30, … 90 -ty (20, 30, 40, 50, 80) ❖double-digit “-” (hyphen) ❖three-digit “and” （omitted in oral E except with single digit）