British Multiplication

1
British Multiplication

• Also known as
• The Tower method

2
46x37 46 x37
322 1380 1702

• Work out 46x7 and write answer in columns
• Put a zero
• Then work out 46x3
• Add down the columns
• Answer 1702

• Mistakes Made by Students
• Basic multiplication is not strong enough
• Forget the zero or put it with the 322
• Answers not in columns so dont add properly
• Find 6x7 then 4x3 and write answer as 1242
• Many many more!!!

3
Chinese Multiplication A free download from
www.emaths.co.uk

• Also known as
• The Gelosia method
• The Lattice Method

4

• 46 37

Draw grid
Draw lattice
5

• 46 37

4
6
3
7
6
63

• 46 37

4
6
1
3
8
7
7

• 46 37

4
6
1
3
8
67
4
7
2
8

• 46 37

4
6
43
1
1
3
8
2
4
7
2
9

• 46 37

4
6
1
1
3
8
2
47
4
2
7
2
8
10

• 46 37

4
6
Add diagonals
1
1
3
8
2
4
2
7
2
8
11

• 46 37

4
6
1
1
3
8
2
4
2
7
2
8
2
12

• 46 37

4
6
84820
1
1
3
8
2
4
2
7
2
2
8
0
2
13

• 46 37

4
6
22217
1
1
3
8
2
4
2
7
2
2
8
7
0
2
14

• 46 37

4
6
1
1
3
1
8
2
4
2
7
2
2
8
7
0
2
15

• 46 37 1702

4
6
1
1
3
1
8
2
4
2
7
2
2
8
7
Read off answer
0
2