JHS1 Mathematics · Term 1 Week 5: Number Operations

Lesson notes

Learning Objectives

Indicator: B7.1.2.2.3 - Create and solve story problems involving decimals on the four basic operations.

By the end of the lesson, learners can:

Identify the correct operation (addition, subtraction, multiplication, or division) needed to solve a story problem involving decimals.
Solve at least two-step word problems involving decimals using the four basic operations with accuracy.
Extract and organise decimal data presented in a table to answer questions requiring addition, subtraction, or multiplication.
Create their own original story problems involving decimals set in familiar situations, and provide correct solutions to them.
Justify their choice of operation in a word problem by explaining the meaning of the numbers in the story context.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Number Operations (1.2)
Content standard: B7.1.2.2 - Demonstrate an understanding of addition, subtraction, multiplication and division of (i) whole numbers, and (ii) decimal numbers, to solve problems.
Indicator: B7.1.2.2.3 - Create and solve story problems involving decimals on the four basic operations.
Suggested placement: Term 1, Week 5 (Week 5 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. 11
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Solve word problems.
(i) A group of two hundred and fifteen men and seven hundred and eighty-four women went to watch a musical concert. An amount of GH₵25 was collected at the gate from each person. How much money was collected all together?
(ii) Mrs Adamu bought 13.6kg of meat. Mrs Anderson bought 2.4kg of meat less than Mrs Adamu. How many kilograms of meat did they buy all together?
(iii) Ebo weighs 28.6kg. His father weighs four times as heavy. What is the total weight of Ebo and his father?
(iv) Mrs Armah bought 45.75 metres of linen for her five children. If they share the material equally, how many metres of linen did each receive?
E.g.2 Solve word problems on data presented in a table
(i) In preparation towards an open day anniversary, a school's Management Committee approved the following budget on some projects.

Figure from the jhs1 mathematics curriculum, printed page 12

Activity Cost (GH₵)
Painting school building 4,580 Mending cracks on the basketball pitch 3,050 Restock the library with new books 2,690 Buying of choir robes 5,340 Buying prizes for awards 4,270
(a) How much was approved for painting the school building and buying choir robes?
(b) How much more was to be spent on mending the cracks on the basketball pitch than restocking the library with new books?
(c) How much was spent on buying prizes for awards if twice the amount approved was spent on this activity?