NL: reading Roman numerals 1-12. 16th March 2016

By the end of today’s lesson… You will be able to: Read the Roman numerals for numbers 1-12. Write a numbers 1-12 using Roman numerals. Tell the time from an analogue Roman numeral clock.

Reading Roman numerals Roman numerals use letters instead of our usual numbers. Not every number has its own letter. Combinations of these letters make up the numbers. The highest value letter must always be used.

These are the only 3 letters we need for numbers up to 12. The letters/numerals I=1 V=5 X=10 These are the only 3 letters we need for numbers up to 12.

1 I

2 II 1+1

3 III 1+1+1

4 IIII 1+1+1+1

Or… 4 IV 5-1 (1 before 5)

5 V

6 VI 5+1

7 VII 5+1+1

8 VIII 5+1+1+1

9 IX 5-1 (1 before 10)

10 X

11 XI 10+1

12 XII 10+1+1

Practise In pairs- your partner will give you a number between 1 and 12. On your whiteboard, write this in Roman Numerals. Remember that: I=1 V=5 X=10

Telling the time Lots of clocks have Roman Numerals on them. We tell the time in exactly the same way, we just have to read Roman numerals. Click on the clock to practice… Drag the hands on Big Ben to make a time.

16/03/2016 NL: reading Roman numerals 1-12. Task 1- Writing Roman numerals. Paired game- Take in turns to roll 2 dice. Add the numbers together. Find this number on the grid and write it using Roman numerals. Keep going until you have written all 12 numbers. (Roll one dice to get 1). Stick the sheet into your books. Task 2- Reading Roman numeral clocks Choose one of the three clocks sheets. Select your challenge level: ★, ★★ or ★★★. Write the time each clock says on the sheet and stick into your books.