Question

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

Answer 1

Ответ:

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

1) 3,9-5.8= -1.9

2)

$\frac{ - 1}{45} - \frac{ 7}{9} = \frac{ - 36}{45} = - \frac{4}{5}$

3)

- 19 + 4/5+1,1

4)

-19 + 0.8 +1,1=0

Answer 2

Ответ:

0

Объяснение:

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

Вычеслить разность

(-1,9)-(-4/5)+1,1

убрать ненужные скобки

- изменяем на + и убираем скобки

-1,9+4/5+1,1

Преобразовать дробь в десятичную

-1,9+0,8+1,1

сложыть числа

-1,9+1,9

получается

0

Answer 3

To simplify the expression (3.9 - 5.8) - (-1/45 - 7/9) + 1.1, follow these steps:

1. Subtract 5.8 from 3.9: 3.9 - 5.8 = -1.9

2. Subtract -1/45 from -7/9: -(-1/45) - 7/9 = 1/45 - 7/9

3. Find a common denominator for 45 and 9, which is 45: (1/45) - (5/45) = -4/45

Now, we can combine all the simplified parts of the expression:

-1.9 - (-4/45) + 1.1

To add -1.9 and 1.1, you can treat the subtraction as addition by adding the opposite:

-1.9 + 1.1 = -0.8

Now, add -0.8 and -4/45:

-0.8 - 4/45

To add these two numbers, you'll need to find a common denominator, which is 45:

(-36/45) - (4/45) = -40/45

Now, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 5:

(-40 ÷ 5) / (45 ÷ 5) = -8/9

So, the simplified result of the expression is -8/9.