Question

-11,5+(-6,8+3 1/5)=?

Answer 1

Ответ:

Пошаговое объяснение:

решаем скобки. дробь а потом сложение,:

-11,5+(-6,8+3 1/5) ⇒ -11,5+(-6,8+3,2) ⇒ -11,5+(-3,6) ⇒ -11,5-3,6 ⇒ -15,1

простите если допустил ошибку

Answer 2

To solve this expression, let's break it down step by step:

First, let's add the numbers inside the parentheses: -6.8 + 3 1/5.

To add these numbers, we need to convert the mixed number 3 1/5 into an improper fraction.

3 1/5 = (3 * 5 + 1) / 5 = 16/5

So now we have:

-6.8 + 16/5

To add these numbers, we need to find a common denominator. The common denominator for 5 and 1 is also 5.

Converting -6.8 to a fraction with a denominator of 5:

-6.8 = -6 8/10 = -6 4/5 = (-6 * 5 + 4) / 5 = -34/5

Now we have:

-34/5 + 16/5

To add these fractions, we simply add the numerators while keeping the denominator the same:

(-34 + 16) / 5 = -18/5

So, -6.8 + 3 1/5 is equal to -18/5.

Now, let's add this result to -11.5:

-11.5 + (-18/5)

To add these numbers, we need to find a common denominator. The common denominator for 5 and 1 is 5.

Converting -11.5 to a fraction with a denominator of 5:

-11.5 = -11 5/10 = -11 1/2 = (-11 * 2 + 1) / 2 = -23/2

Now we have:

-23/2 + (-18/5)

To add these fractions, we need to find a common denominator, which is 2 * 5 = 10.

Converting -23/2 to a fraction with a denominator of 10:

-23/2 = -23 * 5 / 2 * 5 = -115/10

Now we have:

-115/10 + (-18/5)

To add these fractions, we simply add the numerators while keeping the denominator the same:

(-115 - 18) / 10 = -133/10

Therefore, -11.5 + (-6.8 + 3 1/5) is equal to -133/10.