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.