The sum of the numbers \(54 + 63 + 70 + 57 + 58 + 43 + 55\) is **400**.

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Here are 5 related questions:
1. What is the average of these numbers?
2. How would the sum change if each number was increased by 10?
3. Can you find the median of these numbers?
4. What is the difference between the highest and lowest numbers in this set?
5. How would you calculate the sum if the numbers were given as fractions?

**Tip:** To quickly sum multiple numbers, it can be helpful to group them into pairs that are easy to add mentally (e.g., pairing numbers that add up to 100).

Learn how to calculate the sum of numbers 54, 63, 70, 57, 58, 43, and 55 with a detailed step-by-step solution. Understand basic arithmetic and statistics concepts. Suitable for general mathematics learners.

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