Fractions, Decimals and… · JHS1 Mathematics

Lesson notes

Learning Objectives

Indicator: B7.1.3.2.2 - Solve problems involving addition or subtraction of fractions.

By the end of the lesson, learners can:

Identify the operation (addition or subtraction) needed to solve a word problem involving fractions.
Convert mixed numbers to improper fractions and back to solve addition and subtraction problems.
Solve word problems involving addition or subtraction of fractions with unlike denominators.
Translate a real-life situation into a fraction equation and solve it.
Justify their answer by checking whether it is reasonable in the context of the problem.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Fractions, Decimals and Percentages (1.3)
Content standard: B7.1.3.2 - Demonstrate an understanding of the process of addition and/or subtraction of fractions and apply this in solving problems
Indicator: B7.1.3.2.2 - Solve problems involving addition or subtraction of fractions.
Suggested placement: Term 1, Week 10 (Week 10 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. 20
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Solve word problems involving addition or subtraction of fractions.
i. 3 1 feet are cut off a board that is 12 1 feet long. How long is the 3 4
remaining part of the board?
ii. The Musa family decided to hike to a waterfall, approximately 8⅝ kilometres away. After an hour the lake was still 5⅓ kilometres away. How far did the group hike so far?
iii. If you add 2 fractions and the sum is greater than ½, what can you say about the fractions.