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What is 1 + 3?
Properties of Real #'s (Addition & Multiplication)
The sum or product of any two real numbers is a real number.
You can add or multiply real numbers in any order without changing the result.
The sum or product of three or more real numbers is the same regardless of the way the numbers are grouped.
When you multiply a sum by a number, the result is the same whether you add and then multiply or whether you multiply each term by the number and then add the products.