ADDITION AND

SUBTRACTION

Primary 2

AdditionAli has 3 apples. Yazmin has 2 apples.

How many apples do they have altogether?

The boys have 5 apples altogether.

3 + 2 = 5

Look at this example:

10

16

26+ =

10 + 16 = 26

Try !

12

13

?+ =

Addition

Add 5 red apples and 2 green apples

5

+ =

+ 2 = 7

Addition

Find the sum of 15 and 12.

+ = 27

15 + 12 = 27

Addition without renaming

1. Find the sum of 34 and 23.

3 4

+ 2 3

Tenth Unit

First, add the units then add the tenths

75

Addition with renaming

1. Find the sum of 49 and 32

1

4 9

+ 3 2

First, you must add units and then tenth

UnitTenth

18

Addition- problem Solving

There are 16 boys and 14 girls in the classroom. How many children are there in the classroom?

To find the sum, add the two numbers.

16 + 14 = 30

The sum of 16 and 14 is 30.

Therefore, there are 30 children in the classroom.

Boys Girls

16 14

Addition- Problem solving

56 girls took part in the walkathon. If 15 more boys than girls have taken part in the Walkhaton, how many boys

are there?

To find the whole (or bigger quantity), we add;

56 + 15 = 71

Girls

56

15

?

Boys

The sum of 56 and 15 is 71.The sum of 56 and 15 is 71.

Therefore, there are 71 boys took part in the Therefore, there are 71 boys took part in the Walkhaton.Walkhaton.

Subtraction Amin has 10 pencils

whole

6 of them are long

The rest are short.

?

part

To find one part, we subtract.

10 – 6 = 4Amin has 4 short pencils.

Look at this example:

10

?

16

16 - 10 = 6

Try !

10

?

15Whole

part

part

SubtractionNor has 5 ducks. She gave 2 of her ducks to her sister.. How

many ducks does she have now?

5 – 2 = 3She has 3 ducks now.

Subtraction without renaming1. Find the difference between

27 and 15.

2 7

- 1 5

1 2

UnitTenth

First you must subtract the units then followed by the tenths

Subtraction – with renaming

1. Find the difference between 53 and 36

4 13

5 3

- 3 6

1 7

Tenth Unit

SUBTRACTION- Problem solving68 children take part in the drawing

contest. 37 of them are boys. How many girls are there?

Boys Girls

68

37 ?

The difference between 68 and 37 is 31.The difference between 68 and 37 is 31.

Therefore, there are 31 girls.Therefore, there are 31 girls.

To find one part,To find one part,

we subtract we subtract 68 – 37=3168 – 37=31

SUBTRACTION – Problem Solving154 boys in a school took part in the cross country race . If there are 51 less girls than boys. How many girls have taken part in the

cross-country race?

The difference between 154 The difference between 154 and 51 is 103.and 51 is 103.

Therefore, there are Therefore, there are 103103 girls. girls.

To find one part, To find one part, we subtract we subtract 154 – 51=103154 – 51=103

Girls less

Boys

? 51

154

1 5 4- 5 1

1 0 3

Done by:Hjh Mayzedah Binti Hj Ahmed

Ariffin05D0402

Diploma in Education (In service)