Question

Сколькими способами можно поставить знаки сложения и вычитания между числами 9,5,2,1?

Answer 1

3*2=6 (3-пропуска между ними,2 это -или+)

Answer 2

Ways to Arrange Addition and Subtraction Signs

To determine the number of ways the addition and subtraction signs can be arranged between the numbers 9, 5, 2, and 1, we can consider all possible combinations.

The numbers are: 9, 5, 2, 1.

The possible arrangements are as follows: 1. 9 + 5 + 2 + 1 2. 9 + 5 + 2 - 1 3. 9 + 5 - 2 + 1 4. 9 + 5 - 2 - 1 5. 9 - 5 + 2 + 1 6. 9 - 5 + 2 - 1 7. 9 - 5 - 2 + 1 8. 9 - 5 - 2 - 1

Therefore, there are 8 different ways to arrange the addition and subtraction signs between the numbers 9, 5, 2, and 1.