Long Multiplication
Starter!
Write 3 Bullet Points:
What do you know about Interior and Exterior angles?
1. 2. 3.
Long Multiplication
Objectives
• All can do long multiplication
• Most can use two different methods to solve long multiplication questions
• Some can estimate answers using long multiplication
Multiply these numbers…
10 X 20 =
5 X 20 =
30 X 5 =
70 X 3 =
25 X 5 =
40 X 6 =
18 X 15 =
24 X 11 =
39 X 22 =
200
100
150
210
125
240
270
264
858
Three Different Methods
• 1. Grid method
• 2. Diagonal method
• 3. Long method
1. Grid Method
X 40 5
20
4
• Work out 45 X 24
800 100
160 20
800 + 100 + 160 + 20 =
1080
You try…!
1. 54 X 17 =
2. 81 X 64 =
3. 29 X 45 =
918
5184
1305
2. Diagonal Method
• Work out 45 X 24 You try…!
1. 27 X 82 =
2. 53 X 21 =
3. 96 X 63 =
2214
1113
6048
Diagonal Method continues…
• 452 X 371
167692
3. Long method…
• Work out 45 X 24
4 5X 2 4__
You try…!
1. 23 X 46 =
2. 54 X 73 =
3. 92 X 14 =
1058
3942
1288
Long Multiplication
Objectives
• All can do long multiplication
• Most can use two different methods to solve long multiplication questions
• Some can estimate answers using long multiplication
WILT
• 1.
• 2.
• What I am unsure about….• 1.
