Multiplication

Multiplication
Repeated Addition
How many apples are there altogether?

There are 3 groups. Each group has 2 apples. 2 + 2 + 2 = 6
There are 6 apples altogether.

We read it as two times three equals six.

There are 5 bowls. Each bowl has 2 fish.

2 + 2 + 2 + 2 + 2 = 10

2 × 5 = 10

There are 10 fish in total.

Multiplication

Multiplication by table

Multiplication table of 2


Multiplication table of 3


 Multiplication table of 4


Multiplication table of 5


Multiplication table of 6


Multiplication table of 7


Multiplication table of 8


Multiplication table of 9


Multiplication table of 10

 

Multiplication

How many keys are there in total?

2+2+2

There are 3 twos so:

2 + 2 + 2 = 3 x 2

3 x 2 = 6

There are 6 keys altogether.

How many erasers are there in total?

There are 5 threes so:

3 + 3 + 3 + 3 + 3 = 5 x 3

5 x 3 = 15

There are 15 erasers altogether.

Multiplication

Multiplication without carrying over
Multiplication of a 2 digit number by a 1 digit numberExample: 21 × 3
Solution:
Multiply Tens, 2 Tens × 3 = 6 TensMultiply Ones, 1 Ones × 3 = 3 Ones

Multiplication of a 3 digit number by a 1 digit number
Example: 121 × 4
Solution:

Multiply Hundreds, 1 Hundreds ×4 = 4 Hundreds    Multiply Ones, 1 Ones × 4 = 4 Ones

Multilication

Multiplication with carrying over
Multiplication of a 2 digit number by a 1 digit number

Example: 23 × 4

Solution:
 

Multiplication of a 3 digit number by a 1 digit number