B6 Mathematics · Term 2 Week 12: Variables and Equations

Lesson notes

Learning Objectives

Indicator: B6.2.3.1.2 - Identify the unknown in a problem; represent the problem with an equation; and solve the problem concretely, pictorially or symbolically.

By the end of the lesson, learners can:

Identify the unknown quantity in a given word problem and state it clearly in their own words.
Represent a word problem as a one-step equation using a letter (such as x) for the unknown.
Solve one-step equations of the forms x + a = b, x - a = b, and ax = b using concrete objects, pictures, or symbols.
Check their solution by substituting the value back into the original equation.
Justify their chosen method (concrete, pictorial, or symbolic) and explain why their answer makes sense.

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Curriculum details

Strand: Algebra (Strand 2)
Sub-strand: Variables and Equations (2.3)
Content standard: B6.2.3.1 - Solve problems involving single-variable, one-step equations with whole number coefficients.
Indicator: B6.2.3.1.2 - Identify the unknown in a problem; represent the problem with an equation; and solve the problem concretely, pictorially or symbolically.
Suggested placement: Term 2, Week 12 (Week 24 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.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

exemplars - p.143
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 4-6), 2019, p. 143
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1 Learners find the value of x in equations. 8. 4 + x = 11 9. x - 3 = 10 10. 4x = 12 11. 24 = 3x 12. x = 5 2

Figure from the b6 mathematics curriculum, printed page 143

 There is no B6.2.3.1.1, and the exemplar's equations are numbered 8 to 12, continuing a list that does not appear in B6.