Question

(1,6 + 2 1/5) * 10/19 - (1,7 - 0,8) / (- 3/7)

Answer 1

Всё во вложении. Расписал довольно подробно для большей наглядности. Прошу поставить хорошую оценку.

Answer 2

To solve the expression, let's convert the mixed numbers to improper fractions and then proceed with the operations step by step.

1. Convert the mixed numbers to improper fractions: 1 6/10 can be written as (10 * 1 + 6) / 10 = 16 / 10 2 1/5 can be written as (5 * 2 + 1) / 5 = 11 / 5 1 7/10 can be written as (10 * 1 + 7) / 10 = 17 / 10 0.8 can be written as 8 / 10

Now, the expression becomes:

(16/10 + 11/5) * 10/19 - (17/10 - 8/10) / (-3/7)

2. Perform the operations within parentheses first: (16/10 + 11/5) = (16/10 + 22/10) = (16 + 22) / 10 = 38 / 10 = 19/5 (17/10 - 8/10) = (17 - 8) / 10 = 9 / 10

The expression now becomes:

(19/5) * 10/19 - (9/10) / (-3/7)

3. Perform multiplication and division: (19/5) * (10/19) = (19 * 10) / (5 * 19) = 190 / 95 = 2 (9/10) / (-3/7) = (9/10) * (-7/3) = -63 / 30

The expression now becomes:

2 - (-63/30)

4. Subtract the fractions: 2 + 63/30

5. Convert the mixed number back to a mixed number, if necessary: 2 + 63/30 can be simplified to 2 + 2 3/30, which reduces to 2 + 1/10.

So the final answer is:

2 + 1/10 or 2.1 (in decimal form).