Week beginning 22.06.22
Roman Numerals
We Romans designed a fantastic number system, using adding and subtracting… I challenge you to solve my problems!
Two things to remember:
1: A letter after a larger value letter means you add it:
e.g. XI is 10 + 1 = 11 or CX is 100 + 10 = 110
2. A small valued letter before a big one means you take it away:
e.g. IX is 10 – 1 = 9 or XC is 100 – 10 = 90
This table may also help you!
Challenge 1:
Work out what numbers these Roman numerals represent:
- VIII =
- IV =
- XII =
- XV =
- LX =
- XL =
- XIV =
- XVII =
Now write these numbers in Roman numerals:
- 13 =
- 22 =
- 30 =
- 49 =
- 25 =
- 101 =
- 99 =
- 90 =
Extension Challenge.
Solve these Roman number sentences, write the answer in numbers.
1. LX – VIII = 2. XL – VI = 3. C + XL = 4. MIV + XIV =
Solve these number sentences; write the answer in Roman numerals.
1. 902 + 87 = 2.852 – 15 = 3. 130 – 51=
4. 320 – 58 = 5.875 – 32 = 6. 1231 – 765 =