The result of the calculation \( 15 + 21 + 25 + 19 \) is 80.

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Here are five related questions:
1. What is the average of the numbers 15, 21, 25, and 19?
2. How would you calculate the sum of more than four numbers?
3. What is the sum of 15 + 21 + 25 + 19 + 5?
4. How do you calculate the sum of a series of consecutive numbers?
5. Can you find the product of 15, 21, 25, and 19?

**Tip:** When adding a group of numbers, it helps to pair numbers that sum easily.

Learn how to add the numbers 15, 21, 25, and 19. This problem explains the arithmetic addition process, resulting in a total of 80. Suitable for students in Grades 4-6, this example demonstrates simple addition concepts.

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