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St. Cyprian’s Greek Orthodox

November 2015 Mrs Adrien and Miss Campbell

Parent Workshop

KS1 Multiplication and division

Primary Academy

Purpose of workshopTo explain how we teach your child x and ÷

in KS1.

To give you some ideas of how you can help and support your child at home.

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Maths – when do we use it?

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Multiplication vocabulary

o groups of o lots of o times tableo times o multiplied byo multiply o double

x

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Multiplication

Counting in 10s

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Multiplication

Counting in 2s

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Multiplication

Counting in 5s

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Multiplication

• Children need to learn multiplication tables and multiplication facts.

• Yes – learn to recite tables but also need to know table facts at random.

• e.g. 8 lots of ten are?

• And answer questions like “ How many tens in 80?”

• Not secure in times tables until able to do this quickly.

• Should be working on 10x, 2x and 5x tables in Year 1, continue and work on 3x and 4x in Year 2.

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Multiplication

Problem solving

There are 10 pencils in a pack.

How many pencils are there in 4 packs?

Repeated addition

10 + 10 + 10 + 10 = 40

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Multiplication

3 times 5 is the same as 5 + 5 + 5 = 15 or 3 lots of 5 or 3 x 5

On a number line

0 5 10 15

5 5 5

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Multiplication

As an array

3 x 5 = 15

5 x 3 = 15

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Problem solving

Ella’s dad washes some cars. He uses 12 buckets of water. Each bucket has 5 litres of water. How many litres of water does he use altogether?

There are 15 apples in a tray. Ling has 4 trays of apples. How many apples does Ling have altogether? Show how you work it out.

Your turn! Can you draw pictures or make jottings to show how you couldwork one or both of these out?

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5 10 15 20 25 30 35 40 45 50 55 60

Or 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 60

Or count in 5s 12 times. Or 12 x 5 =60

Ella’s dad washes some cars. He uses 12 buckets of water. Each bucket has 5 litres of water. How many litres of water does he use altogether?

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15141515 15141515 15141515 15141515

10 + 5 10 + 5 10 + 5 10 + 5

4 lots of 10 10 20 30 40

4 lots of 5 5 10 15 20

40 + 20 = 60

There are 15 apples in a tray. Ling has 4 trays of apples. How many apples does Ling have altogether? Show how you work it out.

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Division vocabulary

o share o share equally o divide o divided byo groupso halveo half

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Division

• Children start by understanding equal groups and sharing items out in play and problem solving. Count in 2s, 10s and 5s.

•Sharing equally. There are 6 sweets. How many sweets can 3 children have each?

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Division Grouping There are 6 sweets. How many children can have 2 each?

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So how can you work out a division sum using times tables?

Count in 2s until you get to 16.

2 4 6 8 10 12 14 16

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Division using an empty number line

How many groups of 5 are there in 25?25 ÷ 5 = 5

5 5 5 5 5

0 5 10 15 20 25

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Your turn!

There are 30 children in the class. They need to be in teams of 5. How many teams will there be? Use an empty number line to work it out.

5 5 5 5 5 5

0 5 10 15 20 25 30

6 groups of 5 make 30. So 6 teams.

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How you can support your child at homeLook for and talk about numbers in the environmentPlay gamesShoppingCounting on/backNumber bondsDoubles/HalvesTimes tablesMultiplication factsDivision facts

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http://www.familylearning.org.uk/multiplication_games.html

http://www.ictgames.com/resources.html

http://www.bbc.co.uk/bitesize/ks1/maths/

http://www.comberps.newtownards.ni.sch.uk/maths_games_for_ks1.htm

http://www.maths-games.org/time-games.html

http://www.bbc.co.uk/schools/websites/4_11/site/numeracy.shtml

http://www.woodlands-junior.kent.sch.uk/maths/index.html

Useful websites