Counting, Representation… · B6 Mathematics

Lesson notes

Learning Objectives

Indicator: B6.1.1.2.2 - Count and convert Hindu Arabic numbers to Roman numerals up to 100 (C) and vice versa

By the end of the lesson, learners can:

Convert any Hindu Arabic number from 1 to 100 into its correct Roman numeral form (e.g., 1 = I, 49 = XLIX, 94 = XCIV).
Convert any Roman numeral up to C (100) into its correct Hindu Arabic form (e.g., LX = 60, XCIV = 94).
Read Roman numerals forwards, backwards, diagonally and randomly from a class chart without pointing, using the correct value for each symbol.
Find missing numbers in addition and subtraction sentences that involve Roman numerals, and justify their answers.
Create their own Roman numeral puzzles with missing numbers for a friend to solve.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Counting, Representation, Cardinality & Ordinality (1.1)
Content standard: B6.1.1.2 - Demonstrate understanding of Roman Numerals up to C (i.e. 100)
Indicator: B6.1.1.2.2 - Count and convert Hindu Arabic numbers to Roman numerals up to 100 (C) and vice versa
Suggested placement: Term 1, Week 6 (Week 6 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. 120
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, LX = 60, XCIV = 94, CCCXXXIII = 333, etc.
E.g. 3 Challenge learner to find missing numbers in addition and subtraction sentences involving roman numerals. Ask learners to write similar puzzles for their friends to solve.

Wide black-and-white mathematical teaching visual is organised as a worked calculation with vertical divisions, open... — A wide black-and-white mathematical teaching visual is organised as a worked calculation with vertical divisions, open white space around the main marks. Visible labels, values, and notation include: 2) x+; = XX; 3) xxx•]=xxxV; 4) XL + [; =L; 5) v+L; =XX; 7) XXV; 8); x-C; J=v; 9); XXX; J= XXVII; 10) L-L; ]=xX.