Question

Номер 17. 1) Прибовляй к двум 2 до 20. 2) Вычитай из 20 по 2 до нуля 0. Помогите мне с этим

Answer 1

2+2+2+2+2+2+2+2+2+2=20
20-2-2-2-2-2-2-2-2-2-2=0

Answer 2

2+2+2+2+2+2+2+2+2+2=20.
То есть, нужно сложить 10 двоек
20-2-2-2-2-2-2-2-2-2-2=0
То есть, нужно вычесть 10 двоек.

Answer 3

Task 17: Arithmetic Operations

To solve the given problem, let's break it down into two parts:

1) Adding 2 to numbers from 2 to 20. 2) Subtracting 2 from 20 to 0.

Let's solve each part step by step:

1) Adding 2 to numbers from 2 to 20: To find the sum of numbers from 2 to 20, we can use the formula for the sum of an arithmetic series: Sn = (n/2)(a + l), where Sn is the sum, n is the number of terms, a is the first term, and l is the last term.

In this case, the first term (a) is 2, the last term (l) is 20, and we need to find the sum of all the terms from 2 to 20 by adding 2 to each term.

Using the formula, we can calculate the sum as follows: Sn = (n/2)(a + l) = (19/2)(2 + 20) = 19(22) = 418.

Therefore, the sum of adding 2 to numbers from 2 to 20 is 418.

2) Subtracting 2 from 20 to 0: To find the result of subtracting 2 from 20 repeatedly until we reach 0, we can start with 20 and subtract 2 each time until we reach 0.

Starting with 20, we subtract 2 to get 18. Then we subtract 2 from 18 to get 16, and so on, until we reach 0.

The sequence of numbers obtained by subtracting 2 from 20 until 0 is: 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0.

Therefore, the result of subtracting 2 from 20 until 0 is the sequence: 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0.

I hope this helps! Let me know if you have any further questions.

Note: The sources provided did not contain specific information related to this task. However, the solution to this problem is based on basic arithmetic operations and does not require external sources.