# Homerswood Primary School Year 1 to 4 Maths Parent Workshop Thursday 6 th March 2014.

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Homerswood Primary School Year 1 to 4 Maths Parent Workshop Thursday 6 th March 2014

Aims To explain how we teach your child to add and subtract. To give you some ideas of how you can help and support your child at home.

Addition Vocabulary  together  more than  plus  add  total  and  sum

Addition 6 + 4 = 10 Encourage children to put the biggest number in their head and count on. 6

Addition  Use of number line to count on 6 + 5 = 61178910 6 54123

Place Value Tens and Units Recognizing the value of each digit in 2 or more digit numbers.

Partitioning

This is a ten stick. It is made up of 10 units, or ones, stuck together. This is a unit. It is one square on its own.

What number is this? We have made 13. 1 ten 3 units

What number is this? We have made 40 4 tens 0 units

Addition using place value on a number square 35+ 26 = ? Find 35 on the number square. Partition 26 = 2 tens + 6 Move down – 45 55 Add 6 more.

Addition by partitioning 45 + 34 = 79 45 + 30 + 4 (Partition the smallest number into 10s and 1s) 45 + 4 = 49 (Add the units onto the number) 49 + 30 = 79 (Add the tens onto get the final answer)

Using an empty number line So we start at the biggest number…47 So…. 25 + 47 = 72 47 676869 +20 +1 7071 +1 72 +1 47 + 25 =

Have a go together 85 + 44 = (40 + 4) 12985

3444 5457 +10 +3 So what is 3457 10 + 10 + 3 = 23 So….. + 34 = 57 23 + 34 = 57

Number bonds to 10/20/100 10 + 0 = 102 + 8 = 10 9 + 1 = 101 + 9 = 10 8 + 2 = 100 + 10 = 10 7 + 3 = 10 6 + 4 = 10 5 + 5 = 10 4 + 6 = 10 3 + 7 = 10

Addition using tens and units  It is vital that children understand the value of each digit for column addition. Partitioning

Level 3: Partitioned vertical method: 20 + 3 30 + 2 50 + 5 = 55 Level 4: Standard vertical method: 6 2 5 with carrying 6 2 5 with carrying + 3 8 6 6 3 6 6 3 1

Subtraction Vocabulary  difference between  subtract  fewer  minus  take from  less than  take away

 4 – 2 = 12 3 4 Taking away practically Subtraction

30 – 5 =25 Use of a 100 square to take away 43-20 =23

10 – 5 =5 Use of a number line

43 – 27 = 2737 +10 +3 4043 10 + 3 + 3 = 16 16 Subtraction using a blank number line (counting on)

54 – 32 = 3252 +20 +1 5354 20 + 1 + 1 = 22 22 Have a go together

Subtraction using a blank number line Counting Back 67 – 23 = 44 Partition first, then count back. 6744 47 - 20 - 3

Column Subtraction 1 5 6 8 3 - 3 1 7

How you can support your child  Look for and talk about numbers in the environment  Play games  Shopping  Counting on/back  Number bonds  Doubles/Halves  Time tables  Division facts

Websites http://www.mathletics.co.uk http://nrich.maths.org/public/ http://www.bbc.co.uk/schools/ks2bitesize/maths/number.shtml http://www.teachingtime.co.uk/ http://teachingtables.co.uk http://www.bbc.co.uk/schools/laac/menu.shtml http://www.woodlands-junior.kent.sch.uk/interactive/literacy/index.htm http://www.coxhoe.durham.sch.uk/

Thank you for coming & any questions?

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