Topicme7059f1b0a20134e_1528449000663_0Topic

Writing number as Roman numerals

Levelme7059f1b0a20134e_1528449084556_0Level

Second

Core curriculumme7059f1b0a20134e_1528449076687_0Core curriculum

I. Natural numbers in the decimal numeral system. The student:

5) number up to 3000 written as Roman numeralsroman numeralsRoman numerals presents in the decimal system and numbers written in the decimal system presents as Roman numerals.

Timingme7059f1b0a20134e_1528449068082_0Timing

45 minutes

General objectiveme7059f1b0a20134e_1528449523725_0General objective

Reading and interpreting data presented in various forms and processing it.

Specific objectivesme7059f1b0a20134e_1528449552113_0Specific objectives

1. Presenting Roman numeralsroman numeralsRoman numerals in the decimal system.

2. Presenting numbers in the decimal system as Roman numerals.

3. Communicating in English, developing basic mathematical, computer and scientific competences, developing learning skills.

Learning outcomesme7059f1b0a20134e_1528450430307_0Learning outcomes

The student:

- presents Roman numerals in the decimal system,

- presents numbers in the decimal systemdecimal systemdecimal system as Roman numeralsroman numeralsRoman numerals.

Methodsme7059f1b0a20134e_1528449534267_0Methods

1. Asking the expert.

2. Situational analysis.

Forms of workme7059f1b0a20134e_1528449514617_0Forms of work

1. Individual work.

2. Work in groups.

Lesson stages

Introductionme7059f1b0a20134e_1528450127855_0Introduction

Two students prepare information about the rules of writing numbers as the Roman numeralsroman numeralsRoman numerals. They make a multimedia presentation or posters.

Procedureme7059f1b0a20134e_1528446435040_0Procedure

The teacher starts the conversation about Roman numeralsroman numeralsRoman numerals – where can we meet them? Can we read what number they represent?

Experts (students) present prepared fun facts about Roman numerals to the other students.

Students work individually, using computers. Their task is to get to know the Interactive illustration  that presents signs which we use to write Roman numerals.  

[Interactive graphics]

Students – experts present the rules of writing numbers as Roman numeralsrules of writing numbers as Roman numeralsrules of writing numbers as Roman numerals to the other students.

Rules of writing numbers as Roman Numeralsrules of writing numbers as Roman numeralsRules of writing numbers as Roman Numerals:

- To write numbers a Roman Numerals we use seven signs:

I – 1, V – 5, X – 10, L – 50, C – 100, D – 500, M – 1000.

- To write a number we use maximum three identical of these: I, X, C, M.

- We never put two of these signs V, L, D next to each other.

- If the symbols are in decreasing order, then we add the values they represent, for example:

VI – 6, MMM – 3000, DC – 600.

- If the symbol of a smaller number occurs before the symbol of a greater number, then we subtract the smaller value from the greater value.me7059f1b0a20134e_1527752256679_0- If the symbol of a smaller number occurs before the symbol of a greater number, then we subtract the smaller value from the greater value.

IV – 4, IX – 9, CD – 400.

Students – experts answer the questions and clarify doubts of the other students.

The teacher divides the class into four persons groups. Students do the exercises using the skills they learnt. The experts go around the groups, check if the solutions are correct and clarify doubts.

Task 1

Match the pairs.

[Table 1]

Task 2

Write the numbers using Roman numeralsroman numeralsRoman numerals

a) 35

b) 16

c) 24

d) 82

e) 126

f) 200

g) 502

h) 623

i) 1240

j) 2000

k) 2697

Task  3

Fill in the table.

[Table 2]

Task 4

Do the calculations by changing the Roman numerals into numbers in decimal system and write the result as the Roman numeral.me7059f1b0a20134e_1527752263647_0Do the calculations by changing the Roman numerals into numbers in decimal system and write the result as the Roman numeral.

Example: I + II = 1 + 2 = III

a) IX + XVI

b) XXXII – XIX

c) LVI : IV

d) CII · V

e) (MDCC + CL) : X

f) (MMM – MMCM) · LVII

An extra task:

Write a number using the Roman numeralsroman numeralsRoman numerals that is as greatest as possible, while using each sign only once.

Lesson summaryme7059f1b0a20134e_1528450119332_0Lesson summary

Students do the revision exercises. Then together they sum‑up the classes, by formulating the conclusions to memorise.

- To write numbers a Roman Numerals we use seven signs:

I – 1, V – 5, X – 10, L – 50, C – 100, D – 500, M – 1000.

- To write a number we use maximum three identical of these: I, X, C, M.

- We never put two of these signs V, L, D next to each other.

- If the symbols are in decreasing order, then we add the values they represent, for example:

VI – 6, MMM – 3000, DC – 600.

- If the symbol of a smaller number occurs before the symbol of a greater number, then we subtract the smaller value from the greater value.

IV – 4, IX – 9, CD – 400.

Selected words and expressions used in the lesson plan

roman digitsroman digitsroman digits

roman numeralsroman numeralsroman numerals

rules of writing numbers as Roman numeralsrules of writing numbers as Roman numeralsrules of writing numbers as Roman numerals

decimal systemdecimal systemdecimal system

Roman numeral systemRoman numeral systemRoman numeral system