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Class 301 is holding a school sale to buy a super-calculator. The class uses subtraction to find out how many items have been sold. They use column subtraction to figure out differences in different ways, as well as a number line. Simple sentences and easy-to-understand exercises help make learning about subtraction understandable and fun.
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Class 301 is holding a school sale to buy a super-calculator. The class uses subtraction to find out how many items have been sold. They use column subtraction to figure out differences in different ways, as well as a number line. Simple sentences and easy-to-understand exercises help make learning about subtraction understandable and fun.
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