Number Operations (Addition… · B2 Mathematics

Lesson notes

Learning Objectives

Indicator: B2.1.2.4.3 - Solve one-step and multi-step word problems involving addition and subtraction within 100 using a variety of strategies based on place value, including algorithms.

By the end of the lesson, learners can:

Identify whether a word problem requires addition or subtraction by reading carefully and looking for key words and phrases.
Solve one-step word problems involving addition within 100 using place value strategies (expanded form, base ten blocks) and written algorithms.
Solve one-step word problems involving subtraction within 100 using place value strategies and written algorithms.
Solve multi-step word problems within 100 by breaking them into smaller steps and deciding which operation to use at each step.
Justify their chosen strategy and answer by explaining their working to a partner or the class.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Number Operations (Addition, Subtraction, Multiplication and Division) (1.2)
Content standard: B2.1.2.4 - Develop and use conventional and personal strategies for computing additions up to 100
Indicator: B2.1.2.4.3 - Solve one-step and multi-step word problems involving addition and subtraction within 100 using a variety of strategies based on place value, including algorithms.
Suggested placement: Term 2, Week 2 (Week 14 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 Curriculum for Primary Schools (Basic 1-3), 2019, p. 28
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Yaw has 32 books. Aisha added 13 more books to Yaw's books. How many books do they have altogether?
E.g. 2. Mr. Haruna gave 45 books to Yaa' She gave 11 of the books to her sister. How many books are left?
E.g. 3. Araba needs 8 Ghana cedis to buy exercise books. She has only 5 Ghana cedis. How much money does she need in order to buy the books?