But the rules said addition before subtraction

Mathematics

ScanSolve AI Answer

Answer

-13

Step-by-step solution

3 steps

You're right to ask for clarification, Experto. It's a common point of confusion!

The rule is that addition and subtraction have equal precedence. When you have both in an expression, you perform them from left to right as they appear. The same applies to multiplication and division.

Let's re-examine the expression 3−18+23 - 18 + 2:

  1. Identify operations with equal precedence.

    Here, we have subtraction and addition.

  2. Perform operations from left to right.

    First, perform the subtraction because it appears first from the left:

    3−18=−153 - 18 = -15

  3. Now, perform the addition with the result.

    −15+2=−13-15 + 2 = -13

    So, the result is indeed −13-13.

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