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Week 4: Working with patterns and formulas

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This is an illustration of the number trick using the cloud to represent the number thought of, as follows. Instruction Picture Think of a number Cloud Add 5 Cloud and five lines Double it Two clouds and 10 lines Subtract 8 Two clouds and two lines Divide by 2 One cloud and one line Take away the number you first thought of One line Add 4 Five lines

 2.1 Understanding the number trick