# Substraction of Whole Numbers (Primary 1)

**MATHEMATICS **

**SECOND TERM**** **

**WEEK 2**

**PRIMARY 1**

**THEME – WHOLE NUMBERS **

** PREVIOUS LESSON – WRITING 1 – 5 **

**TOPIC – SUBTRACTION **

**PERFORMANCE OBJECTIVES**

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

- Subtract from whole numbers not greater than 9.
- subtract from whole numbers not greater than 18.
- cross check accuracy in subtraction.

**ENTRY BEHAVIOUR **

**INSTRUCTIONAL MATERIALS**

The teacher will teach the lesson with the aid of:

- Stones
- Oranges
- Bean seed
- Balls
- Bottle tops
- Number beads, etc.

**METHOD OF TEACHING – Choose a suitable and appropriate methods for the lessons.**

*Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. *

**REFERENCE MATERIALS**

- Scheme of Work
- 9 – Years Basic Education Curriculum
- Course Book
- All Relevant Material
- Online Information

**CONTENT OF THE LESSON **

**LESSON 1 AND 2 **

**SUBTRACTION OF WHOLE NUMBERS NOT GREATER THAN 9**

ACTIVITIES 1 – IDENTIFY THE OBJECT

**BALLS **

ACTIVITIES 2 – HOW MANY BALLS

8 balls

ACTIVITIES 3 – 8 BALLS TAKE AWAY 3

ACTIVITIES 3 – LET THEM READ – 8 BALLS TAKE AWAY 3 BALL

That’s, 8 minus 3

ACTIVITIES 4 – COUNT THE REMAINING BALLS

**5 BALLS **

ACTIVITIES 5 – READ 8 BALLS TAKE AWAY 3 BALLS REMANDS 5 BALL

That’s, 8 minus 3 is 5

**Repeat this activities on other countable objects. **

**LESSON 3 AND 4 **

**SUBTRACTION OF WHOLE NUMBERS NOT GREATER THAN 18**

**Follow the same procedure. **

**PRESENTATION**

- To deliver the lesson, the teacher adopts the following steps:

- To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;
- Guides pupils to group a particular set of objects e.g. oranges into 1, 2, 3, 4, 5, 6,7, 8 and 9.
- Pupil’s Activities – Group objects such as oranges, stones etc. into 1, 2, 3, 4, 5, 6 7, 8 and 9.
- Leads pupils to take a group of objects and takeaway a lesser number of the same objects from the group, e.g. in a group of 8oranges take away 6oranges.
- Pupil’s Activities – Count one given group of objects and remove a lesser number of the same objects from the group.
- Guides pupils to group a particular objects, e.g. bean seed into sets of 18, 17, 16, 15, 14, 13, 12,11, 10, 9, 8.
- Pupil’s Activities – Group objects such as bean seed into 18, 17, 16, 15, 14, 13, 12,11, 10, 9, 8.
- Guides pupils to count a group of objects and takeaway a lesser number of the same objects from the group, e.g. in a group of 16bean seed take away 10 bean seeds.
- Pupil’s Activities – Count one given group of objects and remove a lesser number of the same object from the group.
- Leads pupils to give examples of everyday life where accuracy of subtraction is required. Emphasizes the importance of accuracy of subtraction in everyday activities.
- Pupil’s Activities – Give examples of everyday life where accuracy in subtraction is needed.

**CONCLUSION**

- To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

- Next Lesson – Addition

**LESSON EVALUATION **

**Pupils to:**

- subtract given whole numbers not greater than 9.
- subtract given whole numbers not greater than18.
- mention two examples of everyday activities where accuracy in subtraction is needed.