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Use these cards to make some number sentences:
For example:
In each number sentence you must only use a card once, but of course you can re-use them in your next number sentence if you want to.
Can you find a way to use all the cards in one number sentence?
Can you find all the possible ways to use the cards?
Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?