Question

8/21:(-4/7) = как решить?

Answer 1

Ответ:

$\frac{8}{21} \div ( - \frac{4}{7} ) = - \frac{8}{21} \times \frac{7}{4} = - \frac{2}{3}$

Answer 2

To solve the expression 8/21 - (-4/7), follow these steps:

Step 1: Change the subtraction of a negative fraction to addition: -(-4/7) is the same as +(4/7).

Step 2: Find a common denominator for the fractions, which is the product of their denominators (21 and 7). In this case, the common denominator is 21.

Step 3: Convert both fractions to have a denominator of 21: 8/21 remains the same. 4/7 can be converted to (4/7) * (3/3) = 12/21.

Now the expression becomes:

8/21 + 12/21

Step 4: Add the fractions together:

(8/21) + (12/21) = (8 + 12) / 21 = 20 / 21

So, 8/21 - (-4/7) is equal to 20/21.