LessonnotesGH

JHS2 Mathematics · Term 1, Week 9

Number Operations

Lesson notes

Learning Objectives

Indicator: B8.1.2.2.3 - Create and solve story problems involving decimals on the four basic operations.

By the end of the lesson, learners can:

  1. Solve one-step and multi-step story problems involving addition and subtraction of decimals up to 3 decimal places.
  2. Solve story problems involving multiplication and division of decimals up to 3 decimal places.
  3. Extract relevant numerical data from a table to solve word problems involving the four basic operations on decimals.
  4. Create their own original story problems involving decimals and the four basic operations, with correct solutions.
  5. Present and explain their story problems and solutions clearly to peers, using correct mathematical language.

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Curriculum details

Strand
Number (Strand 1)
Sub-strand
Number Operations (1.2)
Content standard
B8.1.2.2 - Apply the understanding of the addition, subtraction, multiplication and division of (i) whole numbers within 10,000, and (ii) decimals up to 1/1000, to solve problems and round answers to given decimal places.
Indicator
B8.1.2.2.3 - Create and solve story problems involving decimals on the four basic operations.
Suggested placement
Term 1, Week 9 (Week 9 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, Common Core Programme (JHS1-JHS3), 2023, p. 98

Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum) 

E.g. 1. Solve word problems
(i) Kofi bought 8 notebooks at GH₵ 12.00 each. Ama bought 12 pens at GH₵ 5.00 each. How much altogether they spend on the items.
(ii) A man gave an amount of GH₵ 2477.25 to be shared equally among his three children. How much did each receive?
(iii) On Adwoa's birthday, the father bought her a pack of chocolate containing 250 bars. If Adwoa took 90 bars of the chocolates and gave the rest to her four friends to share equally, how many bars of chocolates did each receive?
(iv) Mrs Yaboi bought 25.25 metres of cloth for her five children. If they share the material equally, how many metres of cloth did each receive?
E.g.2 Solve word problems on data presented in a table.
(i) In preparation towards a speech day celebration, a school's Management Committee approved the following budget on some projects:
Wide black-and-white mathematical teaching visual is organised as a table with horizontal divisions, vertical...
A wide black-and-white mathematical teaching visual is organised as a table with horizontal divisions, vertical divisions. Visible labels, values, and notation include: Activity; Painting school building; Mending cracks on the netball pitch; Restock the computer laboratory; with new computers; Buying of a new cadet uniform; Buying prizes for awards; Cost; (GHC); 2,940; 4,250; 9,990; 8,740; 5,270. 
Activity Cost (GH₵)
Painting school building 2,940 Mending cracks on the netball pitch 4,250 Restock the computer laboratory 9,990 with new computers Buying of a new cadet uniform 8,740 Buying prizes for awards 5,270
(a) How much was approved for painting the school building and buying of new cadet uniforms?
(b) How much less was to be spent on mending the cracks on the netball pitch than restocking the computer lab with new computers?
(c)How much was spent on buying prizes for awards if twice the amount approved was spent on this activity?
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