Point to an old clock face, and a six-year-old will often read IV as « one, five » or « six », because the letters seem to add up from left to right. Order matters here. This 1st grade Roman numerals to 20 worksheet uses only three symbols: I, V and X. In the top part, nine cards each show a numeral, such as VI, XI or XVI, and your child marks the matching number among three choices. In the bottom part, six boxes ask how to write numbers like 8, 13 or 19. Two items, the IV card and the number 19, use the subtraction rule, so they deserve a slow look. A second page gives the answer key.