**Rule 20:****Multiplication and division must be completed before addition and subtraction.**

**Problem 2: Calculate .****Answer: The answer is .****Solution:****Convert all the numbers to fractions since the expression contains fractions and whole number. Convert division to multiplication.**The problem can be written. The problem contains multiplication addition, and subtraction. The multiplication must be performed first. Use the numbers on either side of the multiplication signs to calculate the result. The problem can be modified in a series of steps that are listed as follows:

= . Rewrite with common denominators.

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Author: Nancy Marcus

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