Question

2,5+4•1,3-2(1 1/4+2•1,3)

Answer 1

5,7.

2,5+5,2-2равно 5,7.

Answer 2

To simplify the expression, you should follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders (i.e., powers and square roots, etc.), Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right). Let's break down the expression step by step:

1. Start with what's inside the innermost parentheses/brackets: 1 1/4 + 2 * 1.3

2. Calculate the values inside the parentheses/brackets: 1 1/4 = 5/4 (since 1 whole is 4/4) 2 * 1.3 = 2.6

3. Add the results inside the parentheses: 5/4 + 2.6

4. Now, calculate the sum: 5/4 + 2.6 = 5/4 + 10/4 = 15/4

5. The expression inside the innermost parentheses is now 15/4.

Now, we can continue simplifying the outer expression:

2.5 + 4 * 1.3 - 2 * (15/4)

6. Next, perform the multiplication and division from left to right:

2.5 + 5.2 - 2 * (15/4)

7. Calculate the value inside the parentheses/brackets:

2 * (15/4) = (2 * 15)/4 = 30/4 = 15/2

8. Now, substitute this value back into the expression:

2.5 + 5.2 - 15/2

9. Finally, perform the remaining addition and subtraction from left to right:

2.5 + 5.2 - 15/2 = 2.5 + 5.2 - 7.5

10. Calculate the final result:

2.5 + 5.2 - 7.5 = 10.2 - 7.5 = 2.7

So, the simplified result of the expression is 2.7.