1) I have 1 litre of water in a jug. On the way to my table I spill some. I have 500ml left. How much water have I lost?
2) I have 1 litre of sprite. I give 300ml to William, 200ml to Paul and 300ml to Mickey. How much do I have left?
3) Katie does not like milk so she gives me her 300ml glass of milk. Jade also gives me half of her 300ml glass because she is full. How much milk do I have?
4) I have a big bucket. I need to put 1 litre of water in it for my science experiment but I only have a 300ml and a 50ml container. How can I get 1 litre of water using these containers?
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