Question

Обчисліть суму чисел цього ряду зручним способом:21,7,10,13,9,15.6,5.14.

Answer 1

(21+9)+(7+13)+(15+5)+(6+14)+10=30+20+20+20+10=100

Answer 2

I can help you with your math question. The series of numbers you have given is not an arithmetic or geometric series, so there is no general formula for finding the sum. However, you can use a simple method to add up the numbers. Here are the steps:

- Arrange the numbers in pairs, starting from the ends and moving towards the center. For example, 21 and 5.14 are a pair, 7 and 15.6 are a pair, and so on. - Add each pair and write the result below them. For example, 21 + 5.14 = 26.14, 7 + 15.6 = 22.6, and so on. - Add the results of the pairs and write the final answer. For example, 26.14 + 22.6 + 23 + 9 = 80.74.

The sum of the series is 80.74. This method works because it reduces the number of additions you have to do, and it also helps you avoid rounding errors. You can learn more about this method and other ways to find the sum of a series from these videos and .

I hope this helps. If you have any other questions, feel free to ask me.how to calculate the sum of a series of numbers