Addition of whole numbers with sum less than 20
Mathematics Second Term Primary 1
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Subject : Mathematics
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Term : Second Term
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Week : 4
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Class : Basic 1 / Primary 1 / Grade 1
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Topic :Â Addition of whole numbers with sum less than 20
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Previous Knowledge : The pupils have been taught   Addition of whole numbers with sum less than 10
in their previous lesson
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Reference Books :
- MAN Mathematics Book 1
- Understanding Mathematics Book 1
- New Method Mathematics Book 1
- Learn Africa Mathematics Book 1
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Instructional Materials
- Counters
- Bottle crown cover 👑
- Abacus
- Match sticks
- Fingers
- Toes
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Behavioural Objectives
By the end of the lesson, the learners will be able to
- add two whole numbers less than 20
- Add numbers whose sums are less than 20
- Recognize Maths symbols like addition symbol âž•Â and say what it stands for
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Teaching ResourcesÂ
- Counters
- Stones
- Donuts
- Paper bag
- Number cards
- Number chart
- Bottle tops
- Buttons
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Content
This symbol âž• means addition
It means count together
It means sum up
Find the sum
Increase
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Examples in sentences
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16 âž• 2 = 18
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17 âž• 3 = 20
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 13 ➕ 6 = 19
7 âž• 11 = 18
4 âž• 13 = 17,
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Presentation :
The topic is presented step by step
Step 1 :The class revises the previous topic
Step 2 : The class teacher introduces the new topic which is counting, reading and identification of Numbers from one to five
Step 3 : Allow learners to give their own ideas and suggestions and corrects them when the needs arise
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Evaluation
Answer the following questions
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Count the following objects together and answer the questions that follow
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17 âž• 2 =
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2 âž• 14 =
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13Â âž• 3 =
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4 âž• 12 =
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15Â âž• 3 =
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4 âž• 14Â =
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17 âž•Â 2 =
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8 âž• 11
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9 âž•1 0
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10 âž• 10
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Conclusion
The class teacher goes round to access, read, marks and does the necessary corrects.
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Addition of whole numbers with sum less than 10
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