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÷. Written Methods. Long Division. ÷. ÷. Chris Clements. . Learning Objective:. LO: I can understand and use long division. How to do Long Division:. 504 ÷ 21 =. Before you begin to solve an equation, using a long written method, it is important to make an approximation first. - PowerPoint PPT Presentation
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÷
÷ Chris Clements
Written Methods
Long Division
÷
<date>
Learning Objective:
LO: I can understand and use long division.
How to do Long Division:
504 ÷ 21 =
Before you begin to solve an equation, using a long written
method, it is important to make an approximation first.
If we round 504 to 500 and 21 to 20 we make an equation we can do
mentally. 500 ÷ 20 =
25
We can use this to check the answer
at the end.
Set the sum out correctly
21 5 0 4
Start with the largest place holder in this case it will be the hundreds column.
5 ÷ 21 not possibleSo put a 0 above
the hundreds column
0
Carry the 5s digit over to the Tens
column!
50 ÷ 21 =
21 x 2 = 42
2
2- 48 4
84 ÷ 21 = 4
4
- 8 40
No remainders
50 – 42 = 8
Set the sum out correctly
21 5 0 4
0 2 4
The answer is 24; check using approximation.
500 ÷ 20 =
25
If the approximation is nowhere near your
answer. You will need to go back and check each of your calculations for
mistakes.
1) Make an approximation (Use to check answer)
2) Carry out calculation (see below)3) Check your answer
Long Division
Steps to success
21 5 0 40 2
2- 48
4
4
- 84
0 No remainders
Try this equation; 848 ÷ 16
16 8 4 8
Start with the largest place holder in this case it will be the hundreds column.
8 ÷ 16 not possibleSo put a 0 above
the hundreds column
0
Carry the 8s digit over to the Tens
column!
84 ÷ 16 =
16 x 5 = 80
5
0- 84 8
48 ÷ 16 = 3
3
- 4 80No remainders 84 – 80 = 4
Approximation 800 ÷ 16 =
50
Set the sum out correctly
16 8 4 8
0 5 3
The answer is 53; check using approximation.
800 ÷ 16 =
50
If the approximation is nowhere near your
answer. You will need to go back and check each of your calculations for
mistakes.
Activity
<type here>
PlenaryMay saved her
pocket money for a number of weeks so that she could buy her favourite packs of stickers. She saved £6 and stickers cost 18p a pack. How many packs could you afford to buy?
How many stickers did she buy?
18 6 0 0
0 3
4- 56 0
3
- 5 46
How much change did she get? 6p
33 x 6 = 198
6 stickers in each
pack
