Hitung dari satu sampai sepuluh. Hitung kelipatan sepuluh. Tantang diri sendiri dengan bilangan yang lebih sulit. Membaca tahun.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This is a good set of numbers to learn. If there are two options listed, there are two correct ways to write that number. Most people stick to one or the other, either using the subtraction method when possible, or writing everything as addition.  1 = I 2 = II 3 = III 4 = IV or IIII 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX or VIIII 10 = X Here are the Roman numerals from ten to hundred, counting by tens:  10 = X 20 = XX 30 = XXX 40 = XL or XXXX 50 = L 60 = LX 70 = LXX 80 = LXXX 90 = XC or LXXXX 100