Question

(3,9-5,8)-(-1/45-7/9)+1,1

Answer 1

(3.9-5.8)-(-1/45-7/9)+1.1 = -1.9-(-1/45-35/45)+1.1 = -0.8-(-36/45) = -0.8+4/5 = 0

Answer 2

Let's break down the expression step by step:

1. (3,9 - 5,8): This appears to be a subtraction operation between two numbers, 3.9 and 5.8. The result would be:

   3.9 - 5.8 = -1.9

2. -(-1/45 - 7/9): This is a subtraction operation of two fractions, -(1/45) and 7/9. The result would be:

   -(-(1/45) - 7/9) = -(1/45 + 7/9)

   To add these fractions, we need to find a common denominator, which is 45:

   -(9/405 + 35/405) = - (44/405)

3. • 1.1: This is a simple addition of two decimal numbers:

   • (44/405) + 1.1

To continue, we need to convert - (44/405) to a decimal, then add it to 1.1:

Let's calculate the result:

• (44/405) ≈ -0.1086419753 (approximately)

Finally, add it to 1.1:

1.1 - 0.1086419753 ≈ 0.9913580247 (approximately)

So, the final result of the expression is approximately 0.9913580247.