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

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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.

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Addition Vocabulary together more than plus add total and sum

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Addition Adding practically =5

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

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Addition Use of number line to count on =

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

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Partitioning

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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.

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What number is this? We have made ten 3 units

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

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

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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)

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

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Have a go together = (40 + 4) 12985

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So what is = 23 So… = = 57

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Number bonds to 10/20/ = = = = = = = = = = = 10

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

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Level 3: Partitioned vertical method: = 55 Level 4: Standard vertical method: with carrying with carrying

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

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4 – 2 = Taking away practically Subtraction

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

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10 – 5 =5 Use of a number line

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

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54 – 32 = = Have a go together

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

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Column Subtraction

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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

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Websites

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Thank you for coming & any questions?

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