Question

(12,42 ÷(2 7/10×4)+4,1)×0,8-3,8 (28- 11× 0,1 -16.9)×4/25

Answer 1

Ответ 2.7
две целых семь десятых

Answer 2

To solve the expression, follow the order of operations (PEMDAS/BODMAS - Parentheses/Brackets, Exponents/Orders, Multiplication and Division, Addition and Subtraction) to get the result:

1. First, calculate the values inside the innermost parentheses/brackets:

   a. Inside the first set of parentheses: 12,42 ÷ (2 7/10 × 4) + 4.1

   b. Inside the second set of parentheses: 28 - 11 × 0.1 - 16.9

2. Then, perform the calculations inside the innermost parentheses/brackets, moving from left to right.

   a. First set of parentheses: 2 7/10 = 2.7 (since 7/10 is the same as 0.7) 2.7 × 4 = 10.8 12.42 ÷ 10.8 + 4.1

   b. Second set of parentheses: 28 - 11 × 0.1 = 28 - 1.1 = 26.9 26.9 - 16.9

3. Now, you can perform the calculations inside the outermost parentheses/brackets:

   a. First set of parentheses: 12.42 ÷ 10.8 + 4.1 = 1.148148... + 4.1 ≈ 5.248148...

   b. Second set of parentheses: 26.9 - 16.9 = 10

4. Now that you have simplified both sets of parentheses, you can proceed to the next steps.

   (5.248148... × 0.8 - 3.8) × (10) × (4/25)

5. Continue with multiplication and division from left to right:

   a. 5.248148... × 0.8 ≈ 4.198519...

   b. 4.198519... - 3.8 ≈ 0.398519...

   c. 0.398519... × 10 ≈ 3.98519...

   d. 3.98519... × (4/25) ≈ 0.637627...

So, the final result is approximately 0.6376.