Solve the following problem using the order of operations:
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Solve the following problem using the order of operations:
Let's remember the rule:
We'll write the exercise in the appropriate form:
Let's solve the exercise from left to right:
Now we'll obtain the exercise:
Let's solve the exercise from left to right:
Now we'll obtain the exercise:
Let's remember the rule:
We'll write the exercise in the appropriate form:
Let's solve the exercise from left to right:
What will be the sign of the result of the next exercise?
\( (-2)\cdot(-4)= \)
The rule is "negative of a negative equals positive". Think of it as: if you owe someone $4 (that's -4), but then they cancel that debt, you gain +4!
+(-9) means "add negative 9" which equals -9. But -(-9) means "subtract negative 9" which equals +9. The first operation matters!
For addition and subtraction only, work left to right after handling negative signs. PEMDAS applies when you have parentheses, multiplication, or division mixed in.
First, rewrite the expression by converting all negative signs: -(-4) becomes +4, +(-9) becomes -9. Then you have:
Double-check your sign conversions first! Most errors happen when handling -(-x) or +(-x). Then work left to right carefully: 20+4-9+8-4 step by step.
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