Welcome to ‘Maths Methods

Workshop’St John’s and St Peter’s

CE Academy

Methods for addition, subtraction, multiplication

& division in KS1.

Aims:•to share ways in which you can help your child at home and the fun you can have with maths;

•to explain some of the methods used in school;

•to share some resources that can be used at home.

How do you, as adults, feel about maths?

How do our children feel about maths?

We all need to work together to ensure that our children

have positive learning experiences.

Children MUST feel positive about maths to be

numerate.

Mental Maths In Key Stage 1

•Counting in ones, twos, fives and tens.

•Counting forward and back, from 1 to 20, and later from 0 to 100.

•There is lots of use of number lines and 1 to 100 number squares.

•Counting objects or events (e.g. hand-claps, jumps) and objects.

Mental Maths In Key Stage 1

•Going over concepts and skills which have already been introduced or taught (e.g. more than/less than, add and takeaway, sharing and groups of)

•Practising recall of number facts (e.g. number bonds to 10, (then 20)

•2 x, 5 x and 10 x times table

Most children will leave each year group with the following skills:

Year 1 Count at least 30 objects reliably. Count on and back in 1s, 2s, 5s and 10s. Double to 20. Read, write & order numbers from 0 to at least 20. Say what is one more & one less (0 to 30). Add & subtract two numbers under 20. Know & use bonds to 20 (and subtraction facts).

Most children will leave each year group with the following skills:

Year 2 Count to at least 100. Explain value of digits (to 3 digits). Read, write & order numbers up to 100. Count on and back in ones & tens from any number under 100. Know & use all bonds to 20. Know all number pairs to 100 using multiples of 10. Double all numbers up to 10 and halve all even numbers up to 20. Know by heart x2, x5 and x10.

How you can help your child to develop and practice their mental maths at home.

•Counting games (e.g. Snakes & Ladders and any dice games)

•Recognising numbers when out and about (e.g. house numbers, bus numbers or car number plates etc.)

•Counting when out and about (e.g. counting steps, cars or lamposts etc.)

•Foam bath numbers/magnetic fridge numbers

How you can help your child to develop and practice their mental maths at home.

•Posters in bedrooms (e.g. 1-100 square, multiplication square). Put these at children's eye level- next to their bed is perfect!

•Timed warnings (e.g. count down from 10-0 for small tasks such as putting on their shoes)

•'I'm thinking of a number' type games.

Strategies used at school

•We all think differently and maths is no exception. We provide the children with a variety of methods of calculating and then encourage them to explore what works best for them.

•We place great emphasis on mental calculation strategies and we aim for the children to be able to understand and use their mental calculation strategies in order to move towards written methods.

•Children are not introduced to formal calculations in Y2. Setting out calculations in a particular way is not necessary but talking and explaining is encouraged.

Changes To Traditional Calculation Methods

•Before they learn to set out calculations in columns, the aim is for all children to be able to add and subtract mentally (i.e. in their heads) any pair of two digit numbers.

•We frequently use both blank and labelled number lines and hundred squares to support our children with their mental addition and subtraction.

•CHILDREN DO NOT USE FORMAL WRITTEN METHODS UNTIL AFTER YEAR 2.

Addition using number line

1 + 4 = 5

Addition using number line

1 + 4 = 5

+1 +1 +1 +1

1 2 3 4 5

Addition Using the Empty Number Line

Addition Using the Empty Number Line

24+65=

Partitioning

24+65=

Partitioning

24+65= (20+60) + (4+5) =

80 + 9 = 89

Now try some yourself!

Partitioning

Subtraction Using a Numberline

9 – 4 = 5

-1 -1 -1 -1

5 6 7 8 9

Subtraction Using the Empty Number Line

Children are taught about ‘lots of’ or ‘sets of’ and are shown the link between multiplication and repeated addition.

Understand the operation of multiplication as repeated

addition using a number line

2+ 2+ 2 =6 +2 +2 +2

0 2 4 6

Using arrays to multiply

4 x 3 = 12

X 3

X 4

Generally, children will use the inverse of their multiplication tables to work out division problems mentally, at this stage.

They will also be taught how to separate a group of objects into sets, to learn the concept of ‘sharing’.

Resources

Have a think about what you have around the house that you could use to create fun maths!

On-line ResourcesThere are so many good resources on the web. Investigate and save your favourites!

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

http://www.topmarks.co.uk/maths-games/5-7-years/counting