First Term Lesson Note for Week Ten
Class : Primary Three
Subject : Mathematics
Topic : Subtraction of Numbers
Duration : 80 Minutes
Period : Double Periods
Reference Book :
- New Method Mathematics for Primary Schools, Book 3, by Learn Africa.
- Lagos State Unified schemes of work for lower Primary Schools, Primary 1 – 3.
- Online Resources
Instructional Material :
Chart showing subtraction of Numbers using normal form.
Learning Objectives : By the end of the lesson learners will be able to :
i. Describe subtraction and it sign.
ii. Identify the other meaning of subtraction.
iii. Perform simple subtraction involving 2 – digits and
Previous Knowledge :
Content :
Subtraction of Numbers
Subtraction means take away, minus or difference.
The symbol of subtraction is a ( – ).
This is simply removal of a smaller value from a larger value.
For example :
i. 79 – 36 =
ii. 356 – 241 =
Subtraction of Numbers can be performed in two ways :
1. Expanded Method
2. Short / Direct Method.
Subtraction of Numbers using Expanded Method :
7 9 = 7 0 + 9
– 3 6 = 3 0 + 6
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4 3 = 4 0 + 3 = 4 3
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