25.2 Students judge the validity of an argument according to whether the properties of the real number system and the order of operations have been applied correctly at each step.

#### Example Problems

$$-5-(3-4\cdot(-2))=$$
$$\frac{2(1-5^2)}{1-3^2}=$$

#### Advice

Adding and subtracting are weak.

Multiplying and dividing are strong.

Exponents are superheroes.

#### Practice

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