### Types of numbers – Roman numerals

```Types of numbers – Roman numerals
12th century.
The Romans had their own system.
Hindu–Arabic
0
1
2
3
4
5
6
7
8
9
10
I
II
III
IV
V
VI
VII
VIII
IX
X
Hindu–Arabic
20
30
40
50
60
70
80
90
100
500
1 000
XX
XXX
XC
C
M
You can have 4 numerals in a row such as llll but it is customary to write IV.
If you put a smaller number in front of a larger number, the smaller number is subtracted from
There is no zero.
1
a 5
b 6
c 50
d 51
e 63
f 10
g 12
h 55
i
14
138
82
G 2
SERIES
TOPIC
Types of numbers – Roman numerals
2
a VI
b XV
c VII
d XVI
e
f
When we are expressing large numbers in Roman numerals, it is useful to work on one place value
= 1 000 + 200 + 70 + 7
= 1 277
3
Thousands
Hundreds
Tens
Units
358
612
475
939
1 563
4
a Star Wars Epsiode IV
b
c Titanic was made in MCMXCVII
G 2
SERIES
TOPIC
15
We need a new system
create
numerals to invent your own number system.
What
to do
–
Will you use a 0 type symbol to develop a place value system so you can easily write
Hindu–Arabic
Hindu–Arabic
0
20
XX
XXX
1
I
30
2
II
40
3
III
50
4
IV
60
5
V
70
6
VI
80
7
VII
90
XC
8
VIII
100
C
9
IX
500
10
X
1000
What to
do next
M
your numbers for a friend to solve.
1 _________________________________________________________________
2 _________________________________________________________________
3 _________________________________________________________________
4 _________________________________________________________________
5 _________________________________________________________________
16
G 2
SERIES
TOPIC