Counting, Representation… · B4 Mathematics

Lesson notes

Learning Objectives

Indicator: B4.1.1.2.2 - Count and convert Hindu Arabic numerals to Roman numerals up to 30 and vice versa

By the end of the lesson, learners can:

Convert any Hindu Arabic numeral from 1 to 30 into its correct Roman numeral form.
Convert any Roman numeral up to XXX (30) into its correct Hindu Arabic numeral form.
Read Roman numerals aloud in sequence from I to XXX, forwards and backwards.
Explain the additive rule used in Roman numerals up to 30 (e.g., why XXV means 25).
Justify their conversions by showing the steps they used, checking that their answers follow the rules of the Roman numeral system.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Counting, Representation & Cardinality (1.1)
Content standard: B4.1.1.2 - Demonstrate understanding of Roman numerals up XXX (30)
Indicator: B4.1.1.2.2 - Count and convert Hindu Arabic numerals to Roman numerals up to 30 and vice versa
Suggested placement: Term 1, Week 4 (Week 4 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 4-6), 2019, p. 8
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1 Learners read the chart sequentially forwards and backwards, vertically (up and down), zig-zag, diagonally and randomly without pointing to the numbers. Invite 2-3 learners to read to the class. Call a Roman numeral and ask learners to write
E.g. 2 Give learners a numeral in the Hindu Arabic system and have learners convert to roman numeration and vice versa for instance XXIV = 24