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Helping your child meet their maths target Lots of games and activities for you to choose from! Target focus: Add and subtract multiples of 10,100 and 1,000 and decimals Please ask your child’s teacher if you don’t know their target. A booklet for parents/carers Swaffield PRIMARY SCHOOL

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Finding sums and differences of pairs of 10,100 and/or 1000 Children are encouraged to use their addition and subtraction facts. For example, if you know that 9+8=17, you also know that 90 + 80 = 170, 900 + 800 = 1,700, 9,000 + 8,000 = 17,000 etc. These games can be adapted to what your child is working towards. Helpful hints for parents The ‘if I know, what else do I know’, rule is really important for children to learn as it will be with them forever more and will support calculation skills as they progress. I know 80+20=100, I also know 20+80 =100, 100-80=20, 100-20=80 Sum it up Game 1: Each player rolls a dice If you roll a 5 that represents 5 tens (50). First to add the dices together and call out the correct answer gets a point. First to gets 10 points wins. Game 2: Each player needs a dice. Say: Go! Then each child rolls a dice at the same time. If you roll a 6 that represents 6 tens (60). Add up all the sides of the dice that are showing, remembering that each is a multiple of ten. Whoever has the highest total scores 1 point. The first to get 10 points wins. Both games can be adapted for multiples of 100 and 100 - if you roll a 6 it is 600 or 6000. Door numbers and number plates! Ask your child to say the tens in two next door numbers as you walk past (Or multiples of 100 for long roads!) They then add the two numbers together. For example they would say 40 and 30 from the two door numbers to the right and add them together or find the difference. You could do the same with car number plates for multiples of tens or hundreds. FINGERS Two people put their hands in their lap in fist shapes. Both count to 3 before holding up any number of fingers on one or two hands (depending on child) Add the two numbers. The first person to say the total correctly gets a letter of the word FINGERS. The player that spells the whole word FINGERS first wins the game REMEMBER Make it real ! Make it fun! A litre jug is filled with 300ml of juice. I need 500ml, how much more is needed?

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Play number ‘ping pong’. Start by saying ‘ping’, child replies with ‘pong’. Repeat and then convert to numbers, i.e. say ‘20’ and they reply ‘80’ (pairs of muliples of 10 that equal 100). Adapt for pairs of multiples of 100 (that equal 1,000) pairs of 1,000 (that equal 10,000). Give your child a target number or answer (e.g. 80) Ask them to write as many multiple of ten addition pairs (e.g. 60+20) as they can find to make that number. Children enjoy finding patterns in the answer to this. Encourage them to jot their investigations on paper. For some children the patterns are much clearer when they see them written down. You could ask them for subtraction pairs that make the target number or addition and subtraction pairs. Helpful hints for parents - Mathematical vocabulary to use Words linked to + add, addition, and, count on, plus, sum, more, altogether, total, increase Words linked to – take away, subtract, subtraction, minus, less, decrease, difference between Words linked to = equals, makes, same as Playing cards Remove picture cards. Children turn over two cards, treating each card as multiples of 10, 100 or 1000. The first to say the total or difference correctly keeps the two cards. Whoever has the most cards after 2 minutes is the winner. Or make cards with multiples of 10, 100 and/or 1,000 on them. Pick a domino Turn over two dominoes. This domino could represent 50 and 20. Add the two multiples of ten together, Quickest to call out the correct answer keeps the dominoes. Darts is a fantastic fun way to help children’s mental maths. Use a magnetic dartboard or print a blank template from the internet and use dice as darts. Extend the numbers to multiples of 10 or 100 e.g. 13 becomes 130 or 1,300

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Decimals Dice decimals You need about 20 counters or coins. Take turns. Roll two dice to make a two-digit number, e.g. if you roll a 4 and 1, this could be 4.1 or 1.4. Add these two numbers in your head. If you are right, you win a counter. Tell your partner how you worked out the calculation. The first to get 10 counters wins. Or what do you add to make 1 or 10? Now try subtracting the smaller number from the larger one. How much? Once a week, tip out the small change from a purse/piggybank for your child to count How much do I need to get to the next 10p/pound/£10? Make it fun! Playing cards: Remove picture cards and the 10s. Play snap treating each card as tenths. When you have a pair which total 1, shout snap and explain why e.g. 0.2 + 0.8 = 1. Call out! Play number ping pong! Start by saying 'ping', child replies with 'pong'. Repeat and then convert to numbers i.e. say '0.3' and they reply '0.7' (decimal bonds to 1). Immediately follow with ‘0.7’ and they reply with ‘0.3’, helping recall and reinforcing that addition cab be done in any order. Dice: Roll two die, treating the first as the tens digit and the second as the ones - ask how many more to make 10. Dominoes: Pick a domino from a set facing down. Choose one side to represent the whole number and the other side to be the tenth. Ask how much more to make 10. e.g. picture shows 5.2, so 4.8 more makes 10. Or choose 2 dominos to make a two 1 digit numbers with 1dp (e.g. 4.3) and add. How many dominoes can you get in 2 minutes? Jack has £1, he spends 30p. How much change does he get? 70p! Are you sure? Yes, the sum of 70p and 30p is 100p - that's £1. Make it real! A litre jug is filled with 0.25l of juice. How much more is needed to make a litre? 0.75 of a litre! How did you work that out? Because a quarter of a litre Plus three quarters of a litre equals 1 whole litre.

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Number plates and door numbers! Each choose a car number plate with three digits. Choose two of the digits, e.g. 4 and 6. Make the smallest and largest numbers you can, each with 1 decimal places, e.g. 4.6 and 6.4. Now find the total or difference between the two decimal numbers, e.g. 6.4 + 2.6 = 9.2 Whoever makes the biggest total scores 10 points. The person with the most points wins. Play the game again, but this time using subtraction to find the smallest/biggest difference. Decimal Darts Use a magnetic dartboard or print a blank template of the internet and use dice as darts. Treat the numbers as decimals, for example 1 becomes 0.1 and 13 becomes 1.3. Each player chooses for example 8 answers (e.g. decimal numbers to 10) Ask a question (e.g. 4.2 + ? = 10, 10 – 3.3 = ?) and if a player has the answer, they can cross it off. The winner is the first player to cross off all their answers. Give your child an answer. Ask them to write as many addition decimal number sentences as they can with this answer. For example if the answer is 8, 7.1+0.9,7.2 + 0.8 etc. What patterns do you notice? As one increases, the other decreases. How many can you do in 1 minute? Next week, try and beat your time. Helpful hints for parents The ‘if I know, what else do I know’, rule is really important for children to learn as it will be with them forever more and will support calculation skills as they progress through school. If I know 8.2+1.8 = 10, I also know 1.8+1.2 =10, 10-8.2=1.8, 10-1.8=8.2 and 10-8.2=1.8

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Visit the school website for: A list of useful websites to help your child meet this term’s targets. Parent leaflets on helping your child with counting, times tables and time. Maths resources, including hundred square, multiplication grid and 9 sided dice template. Links to other websites and resources to help you and your child with maths, including the BBC article ‘Why parents can’t do maths today!’ We would appreciate any comments about this booklet. What have you and your child found helpful? What else would you have liked included? Please email your comments to swaffield@swaffield.wandsworth.sch.uk swaffield@swaffield.wandsworth.sch.uk www.swaffield.wandsworth.sch.uk Then go to the curriculum pages - maths

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