Question

7) -5/6+7/8 8) -8/21+1

Answer 1

Ответ:

1/24

Пошаговое объяснение:

Это 100 проц правильно

Answer 2

Let's calculate the expressions step by step:

7. -5/6 + 7/8:

To add these fractions, you need to have a common denominator. The common denominator for 6 and 8 is 24.

So, we'll rewrite the fractions with a common denominator of 24:

-5/6 becomes -20/24 (by multiplying both the numerator and denominator by 4). 7/8 remains 7/8.

Now, you can add them:

-20/24 + 7/8.

To add these fractions, you need to have the same denominator:

-20/24 + (7/8 * 3/3) = -20/24 + 21/24.

Now, you can add the fractions since they have the same denominator:

-20/24 + 21/24 = 1/24.

So, the result of -5/6 + 7/8 is 1/24.

8. -8/21 + 1:

To add these fractions, you need a common denominator, which in this case, can be considered as 21 (the denominator of the first fraction).

So, you'll rewrite the second fraction with a denominator of 21:

-8/21 + 1 * 21/21 = -8/21 + 21/21.

Now, you can add them:

-8/21 + 21/21 = (21 - 8) / 21 = 13/21.

So, the result of -8/21 + 1 is 13/21.