Question

-2,4 × (-5 1/4 +1 5/6) - 9/14 × (4,2 - 1 5/9) = решите срочно.❤​

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

Sure, let's solve the expression step by step:

1. First, let's simplify the parentheses: -5 1/4 + 1 5/6

To add these mixed fractions, we need to find a common denominator, which is 12.

-5 1/4 = -5 3/12 1 5/6 = 1 10/12

Now, we can add them: -5 3/12 + 1 10/12 = -4 7/12

2. Now, we can replace the expression with the simplified value: -2,4 × (-4 7/12) - 9/14 × (4,2 - 1 5/9)

3. Next, let's simplify the second set of parentheses: 4.2 - 1 5/9

To subtract these mixed fractions, we need to find a common denominator, which is 9.

1 5/9 = 1 5/9

Now, we can subtract them: 4.2 - 1 5/9 = 3.3 - 1 5/9

To subtract the fractions, we again need a common denominator. It's 9.

3 3/10 = 3 3/9

Now, we can subtract them: 3 3/9 - 1 5/9 = 2 10/9

4. Now, we can replace the expression with the simplified value: -2.4 × (-4 7/12) - 9/14 × (2 10/9)

5. Let's convert the mixed fraction to an improper fraction: -4 7/12 = -4 × 12/12 - 7/12 = -48/12 - 7/12 = -55/12

2 10/9 = 2 × 9/9 + 10/9 = 18/9 + 10/9 = 28/9

6. Replace the expression again: -2.4 × (-55/12) - 9/14 × (28/9)

7. Now, let's multiply the first part: -2.4 × (-55/12) = 66/12 × 2/5 = 11/5 × 2 = 22/5

8. And the second part: -9/14 × (28/9) = -252/126 = -2

9. Now, the final step is to subtract the two results: 22/5 - 2 = 22/5 - 10/5 = 12/5

So, the final solution to the expression is:

-2,4 × (-5 1/4 +1 5/6) - 9/14 × (4,2 - 1 5/9) = 12/5