Presentation on theme: "‘I didn’t learn to do it that way!’"— Presentation transcript:
1‘I didn’t learn to do it that way!’ Beaconside Parents’ Maths Workshop – Addition and Subtraction5th March 2013‘I didn’t learn to do it that way!’
2Maths! What’s your experience? What are your first thoughts?Do you panic?Have you any negative experiences?
3A world without numbers! Be positive about number!
4Children learn + and - by: Being confident about number – seeing that numbers are everywhere.Using and experiencing a range of resources.Using and experiencing a range of methods so that they can decide which is the best method to use:Pictures; mental calculation - with or without jottings; structured recording; calculatorHow ?Understanding and using a selection of mental strategiesKnowing number bonds ( ie 7+3=10, 18+2= 20)Place value ( understanding the order and the value of digits including zero as the place holder)Money ( everyday money- calculating change)Problem solving
5Resources Number line Counters Online games Place value cards Unifix sticksNumber squareSubitising activities
6SubitisingSubitising is the ability to recognise dot arrangements in different patterns without counting.It is a fundamental skill in the development of number sense and will help in the ability to add and subtract as well as recall number bonds quickly.We can learn:there are 5 dots.5 is more than 45 objects can be separated in to a set of 2 and 35 counters, no matter how arranged, still retain the same numerical quantityThe oral name for a set of 5 things is ‘five’
7Subitising: Activity 1 Play – show me (digits and numbers) Fantastic for fast recall of number bonds – support with + and – facts without the need for counting.
8Place Value – Activity 2We use place value cards in combination with unifix cubes and 100 squares to recognise values of numbers.i.e. Use the place value cards to make the number 245Partition the number.Children understand 245 ==245Zero is important- it is the placeHolder and keeps the number in theCorrect column.
9Activity 3 –addition with jottings using partitioning = 58Success Criteria:Step 1: partition numbers ( tens ) (units 5+3)Step 2: add up the Tens ( = 50)Step 3: add up the Units ( 5+ 3 = 8)Step 4: add both (50 + 8= 58)( = 70) ( 5+6= 11)= 81Key skills – adding 10s mentally – can you use a number square to spot patterns when adding multiples of 10 to any number?
10Activity 4: Back to number bonds: 1+9 = 10 and 9+1=1010+90 = 100 and = 100= 1000 and =1000= 1 and = 1Look for the patterns. Let the children discuss.Now have a go! Show me!See the relationship between subtraction and addition10–9 = 110-1 = 9Now have a go! Show me!
11Activity 5 – Number squares - spot the patterns.
12Number lines are an important tool for addition and subtraction Addition = count onSubtraction is count backSubtraction = differenceAddition = more thanSubtraction = less thanNUMBER LINES:They show the order of numbers from left to right.They are used to count on and back in 1s (Nursery+)Counts on and back in 1s, 2s, 5s, 10s (Reception and Year 1+)Count on and back in 100s (Year 2/Year 3+)Count on and back in 1000s(Year 4+)Count on and back in decimals/fractions (Year 5+)
13Number lines in action: Addition Activity 6 - Have a go…
14Empty Number lines (Addition): Children will begin to use their knowledge of partitioning and counting on in larger steps as they become more confident.Have a go with a partner.
15Number lines (Subtraction): Starting in Reception/Year 1They use number lines by counting back from the start number.The number line should also be used to show that means the ‘difference between 6 and 3’ or ‘the difference between 3 and 6’ and how many jumps they are apart.
16Empty Number lines (Subtraction): Counting back From Year 2Have a go!
17Empty Number lines (Subtraction): ‘Finding the difference method’ – Counting on (Y2 –Y6)Success criteriaPut the smallest number on the leftPut the largest number on the rightSubtract by finding the difference and counting on in steps you feel comfortable.Example:Have a go!
18Now on to the formal methods… Addition: Year 4 onwards:
19Working towards Formal Method – Subtraction (End of Year 3)
21Remember: Be positive about maths! Children have a choice – allow them to play with numbers and choose their own methods.Support and share – let them discuss!Maths can be practical – Food, cooking, coins and money, measuring.Online games and resources can help.
22Children love games to engage their learning. Try some of these: Online gamesChildren love games to engage their learning. Try some of these: