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 Adding practically =5

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

Addition  Use of number line to count on =

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 ten 3 units

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

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

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

Using an empty number line So we start at the biggest number…47 So… = =

Have a go together = (40 + 4) 12985

So what is = 23 So… = = 57

Number bonds to 10/20/ = = = = = = = = = = = 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: = 55 Level 4: Standard vertical method: with carrying with carrying

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

 4 – 2 = Taking away practically Subtraction

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

10 – 5 =5 Use of a number line

43 – 27 = = Subtraction using a blank number line (counting on)

54 – 32 = = Have a go together

Subtraction using a blank number line Counting Back 67 – 23 = 44 Partition first, then count back

Column Subtraction

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

Thank you for coming & any questions?