Hi Elinelin:
I'm just a Mum but definitely agree with others that what you've described is pretty normal - and the confusion was also normal in our experience.
It's very early on in Y2 - but what you should be trying to do is monitor whether your DD's ability with maths is improving.
Does she get regular maths homework? If so is she able to do it on her own or do you have to help a lot? Sometimes this is difficult, because they may be able to do the maths but need help with the instructions/ explanation of what they are meant to do.
Two games are really useful:
Play 21 or Black Jack - explain that Ace = 1, 1 - 10 = 1 - 10 and Jack, Queen and King also = 10.
Now deal two cards to each player. Play the first few hands open, but later you can play with cards up. Have your DD add up her two cards - say 10 and 4. Say you have fourteen. Do you want to pick another card to try and make 21 or do you want to stop there.
Say she decides to pick a card - say it's a 5. Have her add them up (counting on fingers, number line, decomposing - so adding 5 + 4 = 9 and then adding the 10, whatever she wants is fine). She has 19. Does she stay or pick another card.
If you go over 21 - you bust.
If you get 21 - scream BLACK JACK.
If you want to stay - just say I'll hold.
Really helps those mental maths with numbers up to 20.
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The other game is snakes and ladders. Great for counting up - use two - four dice to add bigger numbers (12 - 24) and play the board up and back if using more than 2 dice.
Excellent for subtraction practice as well - just play backwards. Add more dice for subtracting bigger numbers and start from 100 again - agree to play board 2 times or 3 times depending on number of dice.
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some useful websites:
BBC KS1 Bitesize number pyramid: www.bbc.co.uk/bitesize/ks1/maths/addition_and_subtraction/play/ - an addition game where you are asked what + 3 = 9, etc... and have to work out the missing number.
Coolmaths for kids addition lessons/ games: www.coolmath4kids.com/addition/index.html
Coolmaths for kids subtraction lessons/ games: www.coolmath4kids.com/subtraction/index.html
(and for future ref - coolmaths for kids site here: www.coolmath4kids.com/
Woodlands primary addition zone: www.woodlands-junior.kent.sch.uk/maths/numberskills.html
Woodlands primary subtraction zone: www.woodlands-junior.kent.sch.uk/maths/numberskills.html
(and for future ref: woodlands junior school maths zone here: www.woodlands-junior.kent.sch.uk/maths/
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Finally teaching these early maths skills is easier with a 100 number square and interactive ones here:
www.woodlands-junior.kent.sch.uk/maths/interactive/numbers.htm
or try explaining things visually with dried fruit, sweets (like smarties) or buttons. Try to avoid using coins because numbers are on them - but do use them for money problem work.
HTH.
HTH