Simplify each expression. See Example 8. 0.25(8 + 4p) - 0.5(6 + 2p)

검증된 단계별 안내

First, distribute the constants 0.25 and 0.5 to each term inside their respective parentheses. This means multiplying 0.25 by both 8 and 4p, and 0.5 by both 6 and 2p. Write this as: \(0.25 \times 8 + 0.25 \times 4p - (0.5 \times 6 + 0.5 \times 2p)\).

Next, perform the multiplications for each term: calculate \(0.25 \times 8\), \(0.25 \times 4p\), \(0.5 \times 6\), and \(0.5 \times 2p\) separately.

After multiplying, rewrite the expression with the new terms, keeping track of the subtraction sign before the second group of terms: \(\text{(result of first group)} - \text{(result of second group)}\).

Now, remove the parentheses by distributing the subtraction sign across the second group of terms, changing the signs of each term inside the parentheses accordingly.

Finally, combine like terms by adding or subtracting the coefficients of the constant terms and the terms with the variable \(p\) to simplify the expression as much as possible.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Distributive Property

The distributive property allows you to multiply a single term by each term inside a parenthesis. For example, a(b + c) = ab + ac. This property is essential for simplifying expressions like 0.25(8 + 4p) by distributing 0.25 to both 8 and 4p.

Combining Like Terms

Combining like terms involves adding or subtracting terms that have the same variable raised to the same power. After distributing, terms with 'p' and constant terms should be grouped and simplified to reduce the expression to its simplest form.

Basic Arithmetic with Decimals

Understanding how to multiply and subtract decimals is crucial for simplifying expressions involving decimal coefficients. Accurate decimal operations ensure the correct simplification of terms like 0.25 × 8 and 0.5 × 6.