Lesson Note and Plan on Mathematics
Addition II
Subject: Mathematics
Theme: Basic operations
Topic: Addition II
Date: dd/mm/yyyy
Class: Basic 1
Duration: 35 Minutes
No of Learners: 30
Learning Objectives:
By the end of the lesson learners should be able to:1) find missing numbers in a statement
Finding missing numbers e.g.
(a) 8 + ___ = 9
(b) 7 + ___ = 9
(c) 5 + ___ = 8
2) cross-check the correctness of addition in everyday life. i.e solve story problems involving addition in everyday life.
E.g There are 12 apples in a tray. More apples are added and there are 18 apples together. How many apples are added?
Rationale:
Mathematics is all about sharpening the problem-solving skills and critical thinking. Missing numbers or finding the missing values are a big part of helping children build problem-solving skills. Further, finding the missing numbers is a fun activity for the children to identify the patterns and even learn how to count. This skill can be used in various scenarios like balancing a checkbook, solving word problems, and completing calculations. The activity of finding missing counting numbers can help your little one to develop mental skills and enhance their fine motor practice of learning. It also helps kids to understand important mathematical operations like addition, subtraction, multiplication, and division.Prerequisite/Previous knowledge:
Learners have been taught addition and subtration of whole numbers.Learning Materials:
1. flash cards2. countable manipulatives (Pebbles, Oranges, balls, Bottle tops, Number Beads, etc)
3. paper and a crayon
Reference Materials:
1) New Method Mathematics for Primary Schools 1. C. F. Oredugba, R. Ohuche, G. Salahu et al2) Understanding Maths Book 1 African First Pub. Ltd. Marian N. Daud-Osuaght
3) New Approach to Quantitative Reasoning Bk. 1 Rasmed T.A.O. Olayiwola.
Lesson Development:
| STAGE | TEACHER'S ACTIVITY | LEARNER'S ACTIVITY | LEARNING POINTS |
|---|---|---|---|
| INTRODUCTION full class session (3 mins) |
The teacher revises the addition of whole numbers with the learners. Copy and complete the following
additions. 1) 3 + 5 = ___ 2) 4 + 2 = ___ 3) 15 + 4 = ___ 4) 23 + 16 = ___ |
Learners expected response: 1) 3 + 5 = 8 2) 4 + 2 = 6 3) 15 + 4 = 19 4) 23 + 16 = 39 |
Warming up and revising previous lesson on addition |
| The teacher begins the day's lesson by checking learners' textbook/notebook, thereafter tells a story: James has 8 apples in his tray. Peter added some apples to James' tray and there are 12 apples together in James tray. How many apples did Peter added to James tray? Ask learners to write down “8 + _ = 12”. Then ask them to think of two numbers that give the sum of 12. Encourage them to come up with different combinations of numbers like 1 + 11, 2 + 10, 3 + 9, 4 + 8, 5 + 7, 6 + 6. This exercise will help learners understand that there can be multiple solutions to one problem. |
Peter added 4 apples to James' tray 8 + 4 = 12 |
Developing the idea of the concept Addition II (finding the missing numbers in a statement). | |
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| DEVELOPMENT Step 1. Group Work (5 mins) |
The teacher guides the learners to form four groups and asks them to choose their leaders and secretaries. | Learners choose their group leaders and secretaries. | Inculcating leadership skills, competitive spirit, cooperation, teamwork and a sense of responsibility among learners. |
| ACTIVITY 1 Step 2. Group Work (5 mins) Missing numbers in addition sentences. |
The teacher introduce the concept using countable manipulatives (physical objects) The teacher uses a little bit of prompting to guide the learners to answer correctly: 7 buttons and □ buttons give 9 buttons. 7 + □ = 9 □ = 2 2 buttons are added to the box. |
Learners find the missing numbers in a statement corectly. 1) 5 oranges and □ oranges give 8 oranges on the bowl. 5 + □ = 8 □ = 3 3 oranges are added to the bowl. 2) 0 notebook and 7 notebooks give 7 notebooks in the bag □ + 7 = □ = 7 0 notebook is added to the bag 3)16 pencils and □ pencils give 17 pencils in the box 16 + □ = 17 □ = 1 1 pencil is added to the box |
Through practical demonstrations using concrete objects and shapes, guide the pupils to discover the concept of addition II (finding the missing numbers in a statement). |
| ACTIVITY 1 Step 2. Group Work (5 mins) Find missing numbers in a statement |
After understanding the concept, 1) the teacher write an addition equation on the board like “8 + □ = 10”. Ask learners to find the value that will be added into the empty box that will make the result true. Encourage them to use range of numbers to find the missing number. If they add 2 to 8, the sum will be 10. So, the missing number in the empty box is 2 2) Next, the teacher write “□ + 4 = 20” on the board and ask learners to find the value of the missing number in the box. Encourage them to use range of numbers to find the missing number. If they add 16 to 4, the sum will be 20. So, the missing number in the empty box is 16 |
Learners find missing numbers in a statement without the use of countable manipulatives (physical objects) 1) □ + 3 = 3 0 is added to the empty box 2) □ + 0 = 1 1 is added to the empty box 3) 17 + □ = 18 1 is added to the empty box 4) 0 + □ = 0 0 is added to the empty box 5) 12 + □ = 13 1 is added to the empty box 6) □ + 7 = 7 0 is added to the empty box 7) □ + 10 = 20 10 is added to the empty box 8) □ + 7 = 10 3 is added to the empty box 9) 14 + □ = 14 0 is added to the empty box 10) 7 + □ = 15 8 is added to the empty box 11) □ + 12 = 18 3 is added to the empty box 14) □ + 17 = 19 2 is added to the empty box |
Finding the missing number to make each sentence true. |
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| ACTIVITY 2 Step 3. 3 mins. Word problems |
The teacher guides the pupils to demonstrate how to use practical methods to find the missing number in a problem involving an open addition sentence. Lead them to use counting on and counting backwards while doing the questions. | Learners solve word problem correctly 1) Folabi has 4 notebooks. He buys more notebooks in the school store. Altogether he now has 12 notebooks. How many notebooks did he buy? 2) There are 8 pupils in a school bus. Some pupils get onto the bus at the next bus stop. There are now 17 pupils altogether in the bus. How many pupils got on the bus? 3) Mrs Salami had a bag of biscuits. She then bought 3 biscuits and has 12 biscuits in her bag. How many biscuits did she had at the start? Solution 1) 4 + □ = 12 4 + 8 = 12 He bought 8 notebooks 2) 8 + □ = 17 8 + 9 = 17 9 pupils got on the bus 3) □ + 3 = 12 11 + 3 = 12 Mrs Salami had 11 biscuits at the start. |
Real-life activities involving finding the missing number to make each sentence true. |
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| Evaluation Full class session (5 mins) |
Ask the following questions to evaluate the achievement of the set objectives. 1) 13 + □ = 15 2) □ + 5 = 7 3) □ + 7 = 10 4) 2 + □ = 6 5) □ + 4 = 9 6) 12 + □ = 13 7) There are 9 apples in a tray. More apples are added and there are 18 apples together. How many apples are added? |
Learners expected response: 1) 13 + □ = 15 13 + 2 = 15 2) □ + 5 = 7 2 + 5 = 7 3) □ + 7 = 10 3 + 7 = 10 4) 2 + □ = 6 2 + 4 = 6 5) □ + 4 = 9 5 + 4 = 10 6) 12 + □ = 13 12 + 1 = 13 7) 9 + □ = 18 9 + 9 = 18 |
Confirming the achievement of the set objectives. |
| Conclusion, full class session (3 mins) | Learners have learnt that 1) we can find the missing number in addition sentences 2) story problems involving missing added can be solved a) 4 + □ = 13 b) □ + 4 = 19 c) Andrew has 6 notebooks. He buys more notebooks in the school store. Altogether he now has 16 notebooks. How many notebooks did he buy? |
Learners expected answers: a) 4 + □ = 13 4 + 9 = 13 b) □ + 4 = 19 15 + 4 = 19 c) 6 + □ = 16 6 + 10 = 16 |
Communication: This is developed through answering questions verbally and interpreting the silent signs of teammates during the activities. |
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| ASSIGNMENT | The teacher gives learners a take home | Copy and complete the following.
a) 4 + □ = 13 b) □ + 4 = 19 c) □ + 6 = 22 d) 7 + □ = 16 e) Bibi had 4 candles. Williams gave her more candles, she then has 13 candles all together. How many candles did Williams give to her? f) Folabi has some money in his bag. Omas gave him 15 kobo. Altogether he now has 22 kobo. How much money did Folabi had at start? |
Improving their level of understanding on Addition II (find missing numbers in a statement) |