In this lesson, we learn about sets, operations, and opposites of numbers. We start with numerical systems and move on to natural numbers, whole numbers, and the decimal system. The concept of opposites is introduced, and we learn that it is not an entirely new operation, but rather adding the opposite. We also see how division is related to multiplication and how decimals can be used to represent numbers between whole numbers. The lesson ends with a mention of rational and real numbers.
A basic explanation of sets, operations, and opposites of numbers.
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