JHS3 Mathematics · Term 1, Week 7
Number Operations
Lesson notes
Learning Objectives
Indicator: B9.1.2.2.2 - Solve word problems involving the four basic operations and round the answers to the nearest two decimal figures or to some significant figures.
By the end of the lesson, learners can:
- Identify the correct operation(s) needed to solve a multi-step word problem involving decimals.
- Solve word problems that combine two or more of the four basic operations (addition, subtraction, multiplication, division) with decimal numbers.
- Round final answers to two decimal places when required.
- Round final answers to a given number of significant figures (e.g., 3 significant figures).
- Justify their choice of operation and rounding in a group discussion, showing clear working steps.
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Sign in with phone numberCurriculum details
- Strand
- Number (Strand 1)
- Sub-strand
- Number Operations (1.2)
- Content standard
- B9.1.2.2 - Apply the understanding of addition, subtraction, multiplication and division of decimal numbers to solve problems, and round answers to given decimal places and significant figures
- Indicator
- B9.1.2.2.2 - Solve word problems involving the four basic operations and round the answers to the nearest two decimal figures or to some significant figures.
- Suggested placement
-
Term 1, Week 7
(Week 7 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. 169
Transcribed from the official NaCCA publication. Check this page against the source.
Exemplars (from the NaCCA curriculum)
ii) The price of a jacket is three times that of a shirt. The price of a jacket is GH₵560.65. Mr Mensa bought two of the jackets and four shirts for his twin sons. Calculate the total amount Mr Mensa paid for the items, correct your answer to: α) two decimal places β)three significant figures