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Applying precedence of operations, the missing expressions are given as follows:
a) Step 2: - 12.4/4.
b) Step 6: 132 - 3.1.
<h3>What is the precedence of operations?</h3>The precedence of operations is defined according to the PEMDAS acronym, with the meaning of each letter being given as follows:
- P: Parenthesis.
- E: Exponents.
- M: Multiplication.
- D: Division. (same precedence as multiplication, hence it depends on which operation appears first).
- A: Addition.
- S: Subtraction. (same precedence as addition, hence it depends on which operation appears first).
In Step 2, the absolute value operation is interpreted as a parenthesis, hence having a higher precedence over the exponent 8², then the expression is given by:
- 12.4/4.
In Step 6, the division of 12.4 by 4, with a result of 3.1, has a higher precedence than the subtraction, hence the expression is given as follows:
132 - 3.1.
More can be learned about precedence of operations at brainly.com/question/550188
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