Question

1) (3,4:1, 7 + 0,57: 1,9)-4,9 +0,0825; 2,75​

Answer 1

будет -2,57

Пошаговое объяснение:

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Answer 2

To solve the expression (3.4:1, 7 + 0,57:1,9) - 4,9 + 0,0825; 2,75, let's break it down step by step:

Step 1: Simplify the division operations inside parentheses. (3.4:1,7 + 0,57:1,9)

To divide decimal numbers, we divide the numerators and denominators separately. So, the expression becomes: (3.4/1.7 + 0.57/1.9)

Step 2: Evaluate the divisions. (3.4/1.7) = 2 (0.57/1.9) ≈ 0.3 (rounded to one decimal place)

So, the expression inside the parentheses simplifies to: (2 + 0.3)

Step 3: Simplify the remaining expression. (2 + 0.3) - 4.9 + 0.0825; 2.75

Step 4: Perform the addition and subtraction from left to right. 2 + 0.3 = 2.3

Now the expression becomes: 2.3 - 4.9 + 0.0825; 2.75

2.3 - 4.9 = -2.6

Now the expression becomes: -2.6 + 0.0825; 2.75

-2.6 + 0.0825 = -2.5175

Finally, the expression becomes: -2.5175; 2.75

Dividing -2.5175 by 2.75 gives approximately -0.915 (rounded to three decimal places).

Therefore, the final result is approximately -0.915.