Welcome to the Year 2 Maths Workshop 2 nd December 2014

1. Welcome to the Year 2 Maths Workshop 2nd December 2014

2. Aims: • Provide you with support to help your child with their maths skills. • To discuss the importance of having a good understanding key instant recall facts. • To show you how we teach the 4 operations at St. Martin’s.

3. Key instant recall facts (KIRFs)? • Instant recall is one of the most important parts of learning mathematics.  It gives children a bank of knowledge from which they can draw to help them when working with maths in a range of situations.                        • To help develop children’s fluency in mathematics, I am going to ask them to learn Key Instant Recall Facts each half term. I would hope that the children practise their KIRFs at least 3 times a week.

4. Knowing numbers bonds to 10 ,20 and 100 • 0 + 20 = 20 • 1 + 19 = 20 • 2 + 18 = 20 • 3 + 17 = 20 • 4 + 16 = 20 • 5 + 15 = 20 • 6 + 14 = 20 • 7 + 13 = 20 • 8 + 12 = 20 • 9 + 11 = 20 • 20 + 0 = 20 • 0 + 100 = 100 • 10 + 90 = 100 • 20 + 80 = 100 • 30 + 70 = 10 • 40 + 60 = 10 • 50 + 50 = 10 • 60 + 40 = 10 • 70 + 30 = 10 • 80 + 20 = 10 • 90 + 10 = 10 • 100 + 0 = 100 • 0 + 10 = 10 • 1 + 9 = 10 • 2 + 8 = 10 • 3 + 7 = 10 • 4 + 6 = 10 • 5 + 5 = 10 • 6 + 4 = 10 • 7 + 3 = 10 • 8 + 2 = 10 • 9 + 1 = 10 • 10 + 0 = 10

5. Knowing the multiplication and division facts for the 2 times tables • 2 ÷ 2 = 1 • 4 ÷ 2 = 2 • 6 ÷ 2 = 3 • 8 ÷ 2 = 4 • 10 ÷ 2 = 5 • 12 ÷ 2 = 6 • 14÷ 2 = 7 • 16÷ 2 = 8 • 18÷ 2 = 9 • 20÷ 2 = 10 • 2 x 1 = 2 • 2 x 2 = 4 • 2 x 3 = 6 • 2 x 4 = 8 • 2 x 5 = 10 • 2 x 6 = 12 • 2 x 7 = 14 • 2 x 8 = 16 • 2 x 9 = 18 • 2 x 10 = 20

6. I know doubles and halves of numbers to 20 ½ + 2 = 1 ½ + 4 = 2 ½ + 6 = 3 ½ + 8 = 4 ½ + 10 = 5 ½ + 12 = 6 ½ + 14 = 7 ½ + 16 = 8 ½ + 18 = 9 ½ + 20 = 10 1 + 1 = 2 2 + 2 = 4 3 + 3 = 6 4 + 4 = 8 5 + 5 = 10 6 + 6 = 12 7 + 7 = 14 8 + 8 = 16 9 + 9 = 18 10 + 10 = 20

7. Knowing the multiplication and division facts for the 10 times tables • 10 ÷ 10 = 1 • 20 ÷ 10 = 2 • 30 ÷ 10 = 3 • 40 ÷ 10 = 4 • 50 ÷ 10 = 5 • 60 ÷ 10 = 6 • 70 ÷ 10 = 7 • 80 ÷ 10 = 8 • 90 ÷ 10 = 9 • 100 ÷ 10 = 10 • 10 x 1 = 10 • 10 x 2 = 20 • 10 x 3 = 30 • 10 x 4 = 40 • 10 x 5 = 50 • 10 x 6 = 60 • 10 x 7 = 70 • 10 x 8 = 80 • 10 x 9 = 90 • 10 x 10 = 100

8. Telling the time Children need to be able to tell the time using a clock with hands. This target can be broken down into several steps: • I can tell the time to the nearest hour • I can tell the the time to the nearest half hour • I can tell the time to the nearest quarter hour • I can tell the time to the nearest five minutes

9. Knowing the multiplication and division facts for the five times tables • 5 ÷ 5 =1 • 10 ÷ 5 = 2 • 15 ÷ 5 = 3 • 20 ÷ 5 = 4 • 25 ÷ 5 = 5 • 30 ÷ 5 = 6 • 35 ÷ 5= 7 • 40 ÷ 5 = 8 • 45 ÷ 5 = 9 • 50 ÷ 5 = 10 • 5 x 1 =5 • 5 x 2 = 10 • 5 x 3 = 15 • 5 x 4 = 20 • 5 x 5 = 25 • 5 x 6 = 30 • 5 x 7 = 35 • 5 x 8 = 40 • 5 x 9 = 45 • 5 x 10 = 50

10. Top tips for KIRFs • The secret to success is practising little and often. Use time wisely. Can you practise these KIRF’s while walking to school or during a car journey. You don’t need to practise them all at once: perhaps you could have a fact of the day. • Use what you already know e.g. use knowledge of numbers bonds to ten to help with number bonds to 20 • Play games: www.conkersmaths.com http://www.conkermaths.org/cmweb.nsf/products/timestablesballoons.html

11. Songs and chants- you can buy times tables cd’s or find multiplication songs and chants online. If your child creates their own song this can be more memorable. • Test the parent • Apply these facts to real life situations e.g. how many toes are their in your house 10 x ?= • Time- talk about the time. Make sure you have an analogue clock in your house and that your child actually wears a watch. Ask your child the time regularly. E.g. the cakes need to come out of the oven at half past 4 etc

12. Operators

13. Addition- Yr 1 Number lines • First number shows where to start. • Second number shows how many jumps to do. 8 + 4 =

14. Empty number lines – Yr2 1. Draw the line. 2. Biggest number at the beginning. 3. Second number is the amount of jumps. 4. Fill in the numbers 5. Find the answer. 8 + 4 = 12 +1 +1 +1 +1 10 11 12 8 9

15. Chunking- Yr 2 1. Draw the line. 2. Biggest number at the beginning. 3. Partition the second number. 4. Add on the tens. 5. Add on the units. 5. Find the answer. 13 + 12 = 25 10 2 + 10 + 2 13 25 23

16. Column addition (not crossing the tens) 45 + 33 T U 45 + 33 8 7

17. Column addition ( crossing the tens) 49 + 33 T U 49 +33 8 2 1

18. Multiplication • Times tables • Practise, Practise, Practise!! Try: • Visual posters • Songs and rhymes • Speed Tests

19. Repeated Addition 6 x 2 = 12 +6 +6 0 6 24

20. Partitioning • 1. Partition the biggest number. • 2. Multiply both partitioned numbers by the smaller number. • 3. Add the 2 numbers together. 14 x 2 = 28 10 4 10 x 2 = 20 4 x 2 = 8 20 + 8 = 28

21. Subtraction –Yr 1 Number lines • First number shows where to start. • Second number shows how many jumps to do. Jumps underneath the line. 8 – 3 = 5

22. Empty number lines- Yr 2 1. Draw the line. 2. First number at the end. 3. Second number is the amount of jumps. 4. Fill in the numbers 5. Find the answer. 12 – 4 = 8 8 9 10 11 12 -1 -1 -1 -1

23. Column subtraction (not crossing the tens) 85 – 33= 52 T U 85 -33 2 5

24. Column subtraction (crossing the tens) 43 - 29 T U 4 3 2 9 3 1 1 4

25. Division Eggs in baskets • Draw 3 baskets (the second number shows how many baskets to draw. • Share the first number into the baskets. • Count all baskets to ensure you have divided accurately. 12 ÷ 3 = 4 4 4 4

26. Division- numberline-Yr 2 1. Draw the line. 2. First number at the end. 3. Keep subtracting the second number until you reach zero 4. Count the jumps 5. Find the answer. 12 ÷ 3 = 12 -3 -3 -3 -3 9 0 6 3

27. Finally... • Practise is the key to retaining these methods. • Children should also practise these in real situations. • Keep it short, snappy and fun!! Thank you for coming!