This document contains examples and explanations of multiplying decimals using the grid method. It includes step-by-step workings for multiplying decimals, as well as word problems requiring the multiplication of decimals to solve. The document provides feedback and scoring for peer marking and self-reflection on understanding decimals and the grid method.

1. Keywords
I can use the grid method
Multiplying decimals
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
𝑳𝒗 𝟒𝒃 𝑳𝒗 𝟓𝒃 𝑳𝒗 𝟔𝒃
2
x 14
x 3
Half it
Add 58
x 10
÷ 4
÷ 125
2
x 38
x 2
÷ 4
x 5
Double
÷ 100
- 1.8
x 2³
- 6²
x 13
+ (2 x 12²)
÷ 8
Find 2/7
Add ????
2
28
84
42
100
1000
250
76
152
38
190
380
3.8
16
-20
-260
28
3.5
1
2 2 2
+1

2. I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
How do I answer…
23 x 19 ?

3. I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
How do I answer…
32 x 71 ?

4. Keywords
I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
Copy and complete
𝑳𝒗 𝟒𝒂 𝑳𝒗 𝟓𝒄 𝑳𝒗 𝟓𝒃
32 x 5 45 x 21
160
87 x 3 261
26m
12m
𝑭𝒊𝒏𝒅 𝒂𝒓𝒆𝒂:
312m²
42m
42m
1764m²
131 x 28
945
3668
156cm
112cm
𝑭𝒊𝒏𝒅 𝒂𝒓𝒆𝒂:
17472cm²
116m
116m
13456m²
105 x 501
119 x 911
52605
108409
146cm
99cm
𝑭𝒊𝒏𝒅 𝒂𝒓𝒆𝒂:
14454cm²
89m
89m
7921m²

5. I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
How would we do
8 x 0.4

6. I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
How would we do
0.9 x 0.6

7. I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
How would we do
0.18 x 2.4

8. Keywords
I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
𝑳𝒗 𝟓𝒃 𝑳𝒗 𝟓𝒂 𝑳𝒗 𝟔𝒄
1. 0.9 x 0.5
2. 1.3 x 2.5
3. 0.7 x 3.4
4. 4.2 x 3.6
5. 5.3 x 7.2
1. 0.11 x 0.3
2. 1.32 x 2.2
3. 0.27 x 1.11
4. 2.34 x 0.18
5. 1.08 x 0.12
1. 7 x 0.6
2. 3 x 0.9
3. 11 x 0.5
4. 12 x 1.3
5. 9 x 0.14
4.2
2.7
5.5
15.6
1.26
0.45
3.25
2.38
15.12
38.16
0.033
2.904
0.2997
0.4212
0.1296

9. Keywords
I can use the grid method
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
Problem solving
𝑳𝒗 𝟓𝒃 𝑳𝒗 𝟓𝒂 𝑳𝒗 𝟔𝒄
Five bars of metal
each have a mass of
2.3kg. What is the
total mass?
11.5kg
A USB stick holds
1.4Gb of information.
How much information
can 7 hold?
9.8Gb
1 bottle holds 1.35
litres. How much can
11 bottles hold?
14.85l
A hard drive holds
12.45Gb of
information. How
much information can
7 hold?
87.15Gb
I went to a shop with
£10. I buy three
packets of rice costing
£2.85 each. How much
change do I get?
£1.45
10 Crayons cost £7.50.
How much would 6
cost?
£4.50

10. Keywords
I can use the grid method
Peer marking - Use your green pens
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
Tick correct answers (✓)
I am scoring y𝐨𝐮
𝟏𝟎
𝐟𝐨𝐫 𝐞𝐟𝐟𝐨𝐫𝐭 𝐛𝐞𝐜𝐚𝐮𝐬𝐞
Cross incorrect answers ( X )
To improve you need to:
1.
2.
3.

11. Keywords
I can use the grid method
Reflection - Use your green pens
4b 5a 6c
I can multiply decimals I can solve problems by
multiplying decimals
Where did I get to today?
I can now.....
I still need to learn how to .....
I am scoring myself
𝟏𝟎
𝐟𝐨𝐫 𝐞𝐟𝐟𝐨𝐫𝐭 𝐛𝐞𝐜𝐚𝐮𝐬𝐞 … …