First Term Lesson Note for Week Eight
Class : Primary Three
Subject : Mathematics
Topic : Addition of 2 3-digit numbers without renaming.
Duration : 80 Minutes
Period : Double Period
Reference Book :
- New Method Mathematics for Primary Schools, Book 3.
- Lagos State Unified schemes of work for lower Primary, (Primary 1 – 3).
- Online Resources
Instructional Material : Chart showing the addition of two 3 – digit number in expanded form.
Learning Objectives : By the end of the lesson learners will be able to :
i. Describe the term addition
ii. Add two 3 – digit numbers without renaming or regrouping.
iii. Add two 3 – digit numbers using expanded form method.
iv. Solve word problems on addition of numbers
Content :
Addition simply means to count together. It can also be plus, sum, total, and altogether. The sign of addition is (+).
When adding two 3 – digit numbers, we first arrange the numbers under Hundred, tens and unit ( H T U).
Then, we begin our addition from the right hand side under Unit, down to the left which is Hundred.
For example :
Add the following numbers:
1. 344 + 452 = ___________
H T U
3 4 4
+ 4 5 2
________________
7 9 6
________________
2. Add these numbers using expanded form :
454 + 425 = _________
H T U
4 5 4 = 400 + 50 + 4
+ 4 2 5 = 400 + 20 + 5
____________ ___________________
8 7 9 = 800 + 70 + 9 = 879
___________ ____________________
Presentation Steps :
Step 1 : The teacher revises the previous lesson with the learners by asking them questions.
Step 2 : He / she introduces the new topic by explaining addition of numbers to the learners asking them to identify the sign of plus.
Step 3 : Explains that addition begins from the right hand side, which is the unit.
Step 4 : Explains the addition of numbers without renaming using the expanded form method.
Evaluation :
1. Find the sum of 368 and 221
2. 542 plus 333
3. Add 416 to 252
Use Expanded form method to solve the following :
4. 568 + 310 = _________
5. 694 + 305 = __________
Conclusion : At the end of the lesson learners were able to answer the questions correctly. The teacher makes some corrections where necessary.
Assignment :
Solve the following using expanded form method :
1. 512 + 346 =
2. 743 + 242 =
3. 630 + 257 =