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When you're out shopping, try to calculate the discount of something in the sales, or work out how much a bill in a restaurant will come to. Your brain is just like any other muscle - you have to train it to make it work faster.
When you're out shopping, try to calculate the discount of something in the sales, or work out how much a bill in a restaurant will come to. Your brain is just like any other muscle - you have to train it to make it work faster.
