Final answer:
To simplify the expression 5–3 • 70, multiply -3 by 70 to get -210, then add this to 5, which results in 215. We have followed the right order of operations (PEMDAS), and the final answer appears reasonable.
Step-by-step explanation:
To simplify the expression 5–3 • 70, we need to follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). Here, we have no parentheses or exponents, so we'll start with multiplication before subtraction.
First, we multiply -3 by 70:
Next, we subtract the result from 5:
- 5 – (-210) = 5 + 210 = 215
So the simplified expression is 215.
To check if the answer is reasonable, we can review our steps to ensure we followed the order of operations correctly. Since there are no exceptionally high or negative numbers, the result of 215 seems reasonable for this calculation.