Writing and reading numbers in the Roman system
Zapisywanie i odczytywanie liczb w systemie rzymskim
Learning objectives
You will learn to convert numbers written in the Roman systeminto the decimal system and vice versa.
Learning effect
You convert numbers presented in the Roman system into the decimal system and vice versa.
Review the information about the Roman systemRoman system.
Based on the information you have previously recalled, prepare a poster showing the symbols and rules used to write the numbers in the Roman systemRoman system.
Check if the poster you have prepared contains the following information.
Roman number system
To present numbers in the Roman systemRoman system, we use seven numerals: I - 1, V - 5, X - 10, L - 50, C - 100, D - 500, M - 1000.
To write a number, we use three identical symbols maximum: I, X, C, M.
We do not write two identical symbols from: V, L, D.
If the symbols appear in descending order or are equal, then we will add the corresponding symbols to these symbols.
Example: VI – 6, MMM – 3000, DC – 600.If there is a symbol for a smaller number before the symbol denoting a larger number, then the smaller one is subtracted from the larger value.
Example: IV – 4, IX – 9, CD – 400.
Open the applet and combine pairs of numbers written with Arabic numerals and equal numbers presented in the Roman systemRoman system. Choose the levels:
- Level I: from 0 to 100.
- Level II: from 0 to 1000.
- Level II: from 0 to 3000.
Zasób interaktywny dostępny pod adresem https://zpe.gov.pl/a/D12XTd1tX
Solve the following tasks.
Present the dates in the Roman systemRoman system.
a) 1410 - battle of Grunwald
b) 1490 - Władysław Jagiellończyk becomes the king of Hungary
c) 1768 - the discovery of Australia by James Cook
d) 1794 - battle of Racławice
e) 1939 - the outbreak of World War II
Read the dates written in the Roman systemRoman system. And write it in the Arabic systemArabic system.
a) MCMLXXVIII - the election of Karol Wojtyła as the Pope
b) CMLXVI - baptism of Poland
c) MCLXIII - construction of the Notre Dame cathedral in Paris began
d) MDCXXXI - the construction of the Palace of Versailles began
e) MCMXXVIII - discovery of penicillin by Alexander Fleming
What number should be put in place of x? Write the answer using Roman numeralsRoman numerals.
a) CCXXI + x = CD
b) x - CMII = MCXII
c) IV • CCLI = x
d) MMDCVIII: x = DCLII
Compare the numbers. Put <, > or = in the blank space.
Task for volunteers:
Write in the Roman systemRoman system the numbers determining the last four leap years.
Remember:
To present numbers in the Roman systemRoman system, we use seven numerals: I - 1, V - 5, X - 10, L - 50, C - 100, D - 500, M - 1000.
To write a number, we use three identical symbols maximum: I, X, C, M.
We do not write two identical symbols from each other: V, L, D.
If the symbols appear in descending order or are equal, then we will add the corresponding symbols to these symbols.
If there is a symbol for a smaller number before the symbol denoting a larger number, then the smaller one is subtracted from the larger value.
There may be only one character for a smaller number before the larger number.
Do the revision exercises.
Exercises
The difference of numbers MCMLXXXIV and DLXIII is
- MDCXXI.
- 1621.
- 1441.
- MCDXXI.
Write the number greater by 135 than the MDLII number.
Read the words, inserting Roman characters in place of numbers and write them in English.
a) 50 A 50 KA
b) 100 U 500
c) K 50 O 100 E K
d) 500 A 100 H
e) 1000 U N 500 0 A 50
Indicate which pairs of expressions or words are translated correctly.
- cyfry rzymskie - roman numerals
- liczby rzymskie - roman numbers
- zasady zapisywania liczb w systemie rzymskim - rules for presenting Roman numbers
- system rzymski zapisu liczb - arabic system
- system arabski zapisu liczb - roman system
- roman numerals
- cyfry rzymskie
- system rzymski zapisu liczb
- rules for presenting Roman numbers
- roman numbers
- liczby rzymskie
- arabic System
- system arabski zapisu liczb
- roman system
- zasady zapisywania liczb w systemie rzymskim
Glossary
system arabski zapisu liczb
Nagranie dostępne na portalu epodreczniki.pl
wymowa w języku angielskim: Arabic system
liczby rzymskie – do zapisywania liczb w systemie rzymskim używamy siedmiu znaków:
I – 1, V – 5, X – 10, L – 50, C – 100, D – 500, M – 1000
Nagranie dostępne na portalu epodreczniki.pl
wymowa w języku angielskim: Roman numbers
znaki rzymskie – znaki : I, V, X, L, C, D, M
Nagranie dostępne na portalu epodreczniki.pl
wymowa w języku angielskim: roman numerals
system rzymski zapisu liczb
Nagranie dostępne na portalu epodreczniki.pl
wymowa w języku angielskim: Roman system
zasady zapisywania liczb w systemie rzymskim – do zapisu liczby używamy co najwyżej trzech takich samych symboli spośród: I, X, C, M ; nie piszemy obok siebie dwóch takich samych symboli spośród: V, L, D.
Nagranie dostępne na portalu epodreczniki.pl
wymowa w języku angielskim: rules for presenting Roman numbers
Keywords
Arabic systemArabic system
Roman numbersRoman numbers - we use seven characters to write numbers in the Roman system:
I - 1, V - 5, X - 10, L - 50, C - 100, D - 500, M - 1000
Roman numeralsRoman numerals: I, V, X, L, C, D, M
Roman systemRoman system
Rules for presenting Roman numbersRules for presenting Roman numbers - we use maximum three of the same symbols to write numbers: I, X, C, M; we do not write two identical symbols out of: V, L, D