Name
1–7
Date
Using Roman Numerals
The ancient Romans used several letters to write
numbers. The letters they used to write numbers
up to 10 are shown in the box to the right.
I=1
V=5
X = 10
If the smaller Roman numeral is written before the larger Roman numeral, subtract the
smaller value from the larger. For example:
IV = 5 ⫺ 1 = 4
If the smaller Roman numeral is written after the larger Roman numeral, add the values.
For example:
VI = 5 ⫹ 1 = 6
Here are some more examples of numbers written in Roman numerals:
VII = 5 ⫹ 2 = 7
XXV = 10 ⫹ 10 ⫹ 5 = 25
IX = 10 ⫺ 1 = 9
XIV = 10 ⫹ (5 ⫺ 1) = 14
Copyright © Houghton Mifflin Company. All rights reserved.
Multiply or divide. Write the answers using standard numerals.
1.
II ⫻ IX
=
2.
III ⫻ IX
=
3.
XXX ⫼ V =
4.
XXV ⫼ V =
5.
XX ⫼ X
=
6.
X ⫻ IV
=
7.
IX ⫻ IV
=
8.
XVIII ⫼ II =
9.
XII ⫼ III
=
10.
IV ⫻ VI
=
11.
IX ⫻ IX
=
12.
XXVII ⫼IX =
Name
1–7
Date
Using Roman Numerals
I=1
The ancient Romans used several letters to write
numbers. The letters they used to write numbers
up to 10 are shown in the box to the right.
V=5
X = 10
If the smaller Roman numeral is written before the larger Roman numeral, subtract the
smaller value from the larger. For example:
IV = 5 ⫺ 1 = 4
If the smaller Roman numeral is written after the larger Roman numeral, add the values.
For example:
VI = 5 ⫹ 1 = 6
Here are some more examples of numbers written in Roman numerals:
VII = 5 ⫹ 2 = 7
XXV = 10 ⫹ 10 ⫹ 5 = 25
IX = 10 ⫺ 1 = 9
XIV = 10 ⫹ (5 ⫺ 1) = 14
Multiply or divide. Write the answers using standard numerals.
18
2.
III ⫻ IX
=
27
3.
XXX ⫼ V =
5
5.
XX ⫼ X
=
2
6.
X ⫻ IV
=
40
=
36
8.
XVIII ⫼ II =
9
9.
XII ⫼ III
=
4
=
24
11.
XXVII ⫼IX =
3
1.
II ⫻ IX
4.
XXV ⫼ V =
7.
IX ⫻ IV
10.
IV ⫻ VI
=
IX ⫻ IX
=
81
12.
6