Number Operations (Addition… · B3 Mathematics

Lesson notes

Learning Objectives

Indicator: B3.1.2.6.2 - Use concrete and pictorial representations to explain division as repeated subtraction or determining the number of times given equal groups can be obtained in (i.e. goes into or can be subtracted from) a given number

By the end of the lesson, learners can:

Use concrete objects (such as straws, bottle tops, or pebbles) to form equal groups from a given quantity and count the number of groups formed.
Explain division as repeated subtraction by showing how many times a number can be subtracted from a larger number before reaching zero.
Draw pictorial representations (circles, tally marks, or dots) to show division as equal grouping and as repeated subtraction.
Write a division equation that matches a concrete or pictorial representation (for example, 12 ÷ 3 = 4).
Justify their answers by explaining why the number of groups formed is correct using the language “goes into” or “can be subtracted from”.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Number Operations (Addition, Subtraction, Multiplication and Division) (1.2)
Content standard: B3.1.2.6 - Demonstrate an understanding of division
Indicator: B3.1.2.6.2 - Use concrete and pictorial representations to explain division as repeated subtraction or determining the number of times given equal groups can be obtained in (i.e. goes into or can be subtracted from) a given number
Suggested placement: Term 2, Week 5 (Week 17 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 1-3), 2019, p. 56
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1 Give a quantity of straws (e.g. 12) and have learners make equal groups formation of 3 straws in each group and then have learners count the number of equal groups formed.