Lesson Notes By Weeks and Term - Primary 3

Addition and subtraction

TERM: 1st Term

WEEK: 4

CLASS: Primary 3

AGE: 8 years

DURATION: 5 periods of 40 minutes each

DATE:

SUBJECT: Mathematics

TOPIC: Addition and subtraction

SPECIFIC OBJECTIVES: At the end of the lesson, the pupils should be able to

  1. Add and subtract up to 1000 using multiples of 10 and 100

INSTRUCTIONAL TECHNIQUES: Explanation, question and answer, demonstration, practical, assessments

INSTRUCTIONAL MATERIALS: Base 10 kit, 100 number board, scrap paper, videos from source- https://www.youtube.com/watch?v=wWaP5wk8F1A

PERIOD 1: Addition and subtraction of multiples of 10

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1

MENTAL MATHS

The teacher begins the lesson with some mental calculations

Calculate

1. 6 + ____ = 10

2. 3 + ____ = 10

3. 2 + ____ = 10

4. 1 + ____ = 10

5. 5 + ____ = 10

6. 5 + 6 = _____

7. 9 + 5 = _____

8. 4 + 8 = _____

9. 13 – 6 = _____

10. 16 – 7 = _____

Pupils respond and participate

STEP 2

CONCEPT

DEVELOPMENT

The teacher writes 40 + 80 = _______ on the board

With the base 10 kits available, the pupils are asked to answer the questions individually. The learners who got the answers correctly are then asked to share the strategies they used in deriving their answers with the class

 

 

 

 

 

CLASS ACTIVITY

The learners are asked to use the methods explained by the teacher to attempt these questions

1. 50 + 90 = _____

2. 140 – 90 =_____

3. 200 + 300 =_____

4. 600 – 400 = _____

 

Pupils pay attention and participate

STEP 3

CLASS-WORK

Using the place value table, calculate

a. 20 + 90 = _____

b. 130 – 50 = ______

c. 200 + 600 = ______

d. 900 – 200 = ______

e. 60 + 70 = ______

 

Pupils attempt their class work

STEP 4

HOME-WORK

Using the place value table

a. 40 + 90 = ______

b. 700 – 300 = ______

Pupils attempt their class work

STEP 5

SUMMARY

The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value

 

She marks their class works, makes corrections where necessary and commends them positively

 

 

 

PERIOD 2: mental maths addition

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1

MENTAL MATHS

The teacher begins the lesson with some mental calculations

The pupils practice the number bonds of 10

1,9

2,8

3,7

4,6

5,5

Pupils respond and participate

STEP 2

CONCEPT

DEVELOPMENT

The teacher writes 13 + 7 = _____ on the board and asks the learners to solve it mentally. They also represent the addition using counters/place value table addition

Which will give 1 ten and 10 ones which equals 20

 

The same process is repeated for

34 + 6 = _____

58 + 2 = _____

 

CLASS ACTIVITY

The learners work in pairs. One learner calls out any number form 11 to 20, while the other learner thinks about how many more is needed to make 20. For example if the first learner calls out 16, the second learner responds by saying 4 i.e.

16 + 4 = 20

Learners are asked to work out the answers mentally.

Other number combinations like 12, 25 etc can also be tried

 

Pupils pay attention and participate

STEP 3

CLASS-WORK

1 Fill in the missing numbers:

a 15 + (    ) = 20

b 13 + (    ) = 20

c 17 + (    ) = 20

d 19 + (    ) = 20

e 16 + (    ) = 20

 

2 Solve the following:

a 82 + 8 =

b 55 + 5 =

c 63 + 7 =

d 46 + 4 =

e 21 + 9 =

f 74 + 6 =

g 38 + 2 =

h 57 + 3 = 

Pupils attempt their class work

STEP 4

HOME-WORK

Solve the following:

a 41 + 9 =

b 37 + 3 =

c 28 + 2 =

d 65 + 5 =

e 84 + 6 =

The pupils writes it in their homework book

STEP 5

SUMMARY

The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value

 

She marks the class work, makes corrections where necessary and commends the pupils positively

 

 

 

PERIOD 3: Mental maths Addition with carrying

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1

MENTAL MATHS

The teacher begins the lesson with some mental calculations

The pupils practice the number bonds of 20

1,19

2,18

3,17

4,16

5,15

6,14

7,13

8,12

9,11

10,10

Pupils respond and participate

STEP 2

CONCEPT

DEVELOPMENT

The teacher writes 14 + 9 = _____ on the board. The teacher explains that there are three types of solution to the question

a. counting all

b. counting on

c. making-a-ten using the place value table and bonds

 

 

Using bonds

14 + 9 =

She asks herself what number can be added to 14 to make it 20 which is 6

She then breaks 9 into 6,3

So 14 + 6 = 20 and 20 + 3= 23

So 14 + 9 = 23

 

The same process is repeated with

37 + 5 =

63 + 8 =

 

CLASS ACTIVITY

She writes 14 + 20 = _____ on the board and ask the learners to use bonds to answer the above question mentally

The same process is repeated with

37 + 40 =

59 + 20 =

Pupils pay attention and participate

STEP 3

CLASS-WORK

1. Using bonds and blocks, solve these problems

a. 27 + 5 = _____

b. 68 + 5 = _____

c. 55 + 7 = _____

d. 83 + 9 = _____

e. 18 + 4 = _____

 

2 Solve the problems:

a 48 + 3 =

b 19 + 7 =

c 65 + 6 =

d 75 + 8 =

e 13 + 9 =

 

3 What do we get if we add:

a 13 + 80 =

b 51 + 20 =

Pupils attempt their class work

STEP 4

HOME-WORK

Using blocks and bonds, solve these problems

a. 54 + 7 =

b. 29 + 5 =

c. 63 + 9 =

d. 42 + 9 =

 

The pupils writes it in their homework book

STEP 5

SUMMARY

The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value

 

She marks the class work, make corrections where necessary and commends the pupils positively

 

 

 

PERIOD 4: Mental maths subtraction

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1

MENTAL MATHS

The teacher begins the lesson with some mental calculations

The pupils practice the number bonds by saying numbers 10 to 19 randomly and learners answer what you need to add to make it 20

Pupils respond and participate

STEP 2

CONCEPT

DEVELOPMENT

The teacher writes 30 -3 = ____ on the board. Pupils are encouraged to solve the question mentally

Then for those who got it correctly, they are asked to share their strategies with the class

 

 

The steps are repeated with

60 – 7 =

80 – 9 =

 

CLASS ACTIVITY

The teacher writes 25-9= ____ on the board.

Using the make-a-ten method explains that

25-9 is broken into 10+ 10 - 9 + 5

 

Then 10 + 10 = 20

20-9 = 11

11 + 5 = 16

Pupils pay attention and participate

STEP 3

CLASS-WORK

1 Fill in the missing numbers:

a 20 is 13 and

b 20 is 19 and

c 20 is 12 and

d 20 is 16 and

e 20 is 15 and

 

2 Solve the following:

a 20 – 7 =

b 70 – 5 =

c 40 – 1 =

d 30 – 8 =

e 60 – 6 =

f 80 – 9 =

g 50 – 3 =

h 90 – 2 =

Pupils attempt their class work

STEP 4

HOME-WORK

Using blocks and bonds, solve these problems

1 Solve the following:

a 30 – 1 =

b 70 – 8 =

c 20 – 5 =

d 90 – 3 =

e 60 – 4 =

The pupils writes it in their homework book

STEP 5

SUMMARY

The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value

 

She marks the class work, make corrections where necessary and commends the pupils positively

 

 

 

PERIOD 5: Weekly Test/consolidations

TEACHER’S ACTIVITY: The teacher revises all the concepts treated from period 1-4 and gives the pupils follow through exercises, quiz and tests . She marks the exercises, makes corrections and commends the pupils positively.

 

PUPIL’S ACTIVITY: The pupils work on the worksheets and exercises given by the teacher individually

 

ASSESSMENT

1 Solve the problems:

a 57 + 5 =

b 39 + 3 =

c 65 + 8 =

d 46 + 7 =

e 57 + 4 =

f 79 + 4 =

g 32 + 9 =

h 83 + 8 =

 

2 Fill in the missing numbers:

a 55 + ____ = 60

b 37 + ____ = 40

c 41 + ____ = 50

 

3 Solve the following:

a 53 + ____ = 60

b 42 + 8 =

c 27 + ____ = 30

d 88 + 2 =

 

4 Fill in the missing numbers:

a 20 is 14 and

b 30 is 29 and

c 40 is 32 and

 

5 Solve the following:

a 40 – 6 =

b 80 – 5 =

c 20 – 9 =

d 60 – 7 =



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