Traditional method 21 x 13 = ?

2 1

x 1 33 x 1 = 3 write down the 3.

36 3 x 2 = 6 write down the 6

10 x 1 = 10 write down the 10

1 x 2 = 2 write down the 2

Add the numbers

1 02

2 7 3

Traditional method

45 x 34 = ?

4 5

x 3 44 x 5 = 20 write down the 0, carry the 2.

08 4 x 4 = 16, add 2 write down the 18

30 x 5 = 150 write down the 50, carry the one

3 x 4 =12, add the 1, write down the 13

Add the numbers

5 03

5 3 3

1

1

1

1

2