1. Roman Numerals

2. Roman Numerals - Past and Present  Romans used them for trading and commerce.  When Romans learned to write they needed a way to write their numbers.  Roman Numerals are still used today in many different ways.

3. Roman vs. Arabic Numerals  Arabic Numerals are the numbers that we use today.  1, 2, 3, 4, 5, 6, 7, 8, 9, 0  Roman Numerals are used today, but not in everyday writing.  I, V, X, L, C, D, M  Roman Numerals don ’ t have a symbol for zero.

4. How are Roman numerals used today?

5. The Basics  I – stands for 1  V – stands for 5  X – stands for 10  L – stands for 50  C – stands for 100  D – stands for 500  M – stands for 1000

6. The Rules for Writing Roman Numerals  Don ’ t repeat a letter more than three times in a row.  So 4 is written not as IIII but as IV (one before five).  And 6 would be written as VI (one after five).

7. Let’s have a go…  1 = I  2 = II  3 = III  4 = IV  5 = V  6 = VI  7 = VII 8 = VIII 9 = IX 10 = X 11 = XI 12 = XII 13 = XIII 14 = XIV 15 = XV 16 = XVI 17 = XVII 18 = XVIII 19 = XIX 20 = XX 21 = XXI

8. Can you convert these numbers to Roman Numerals?  Write some examples in your Roman books –  17 = 22 = 29 = 30 =  35 = 50 = 40 =  44 = 49 = 58 = 60 =

9. Were you correct? 17=XVII 22=XXII 26=XXVI 29=XXIX 30=XXX 35=XXXV 50=L so 40=XL 44=XLIV 49=XLIX 58=LVIII 60=LX

10. Draw a bingo grid like this…

11. Use these numbers to make your bingo cards  1 = I  2 = II  3 = III  4 = IV  5 = V  6 = VI  7 = VII 8 = VIII 9 = IX 10 = X 11 = XI 12 = XII 13 = XIII 14 = XIV 15 = XV 16 = XVI 17 = XVII 18 = XVIII 19 = XIX 20 = XX 21 = XXI