Question

2/5×(13/18-4/9) (2/3+5/7)×42

Answer 1

Ответ:

ответ: 6.44444444444

Answer 2

To simplify the expression:

1. Start by simplifying the expressions within the parentheses.

   Inside the first set of parentheses: (13/18 - 4/9) can be simplified as follows:

   13/18 - 4/9 = (13/18) - (8/18) = 5/18

   Inside the second set of parentheses: (2/3 + 5/7) can be simplified as follows:

   To add these fractions, we need a common denominator, which is 21.

   (2/3) * (7/7) + (5/7) * (3/3) = (14/21) + (15/21) = 29/21

2. Now, we have the simplified expressions: First set of parentheses: 5/18 Second set of parentheses: 29/21

3. Multiply these two simplified expressions together:

   (5/18) * (29/21)

4. To multiply fractions, multiply the numerators together and the denominators together:

   (5 * 29) / (18 * 21)

5. Calculate the product of the numerators and denominators:

   (145) / (378)

So, the simplified result of the expression is:

145/378