Question

-3 3/7+7 9/14+(-4 5/21)=

Answer 1

вот ответ ::

-0,023809524

Answer 2

To solve the expression, let's simplify each fraction first:

-3 3/7 can be converted to an improper fraction as follows: -3 3/7 = -24/7 + 3/7 = -21/7 + 3/7 = -18/7

7 9/14 can be converted to an improper fraction as follows: 7 9/14 = 98/14 + 9/14 = 107/14

Now, let's calculate the expression:

-18/7 + 107/14 + (-4 5/21)

To add fractions, we need to find a common denominator. The least common multiple (LCM) of 7 and 14 is 14.

-18/7 can be converted to -36/14: -18/7 = -36/14

Now we can add the fractions:

-36/14 + 107/14 + (-4 5/21)

Next, let's convert -4 5/21 to an improper fraction: -4 5/21 = -4 * 21/21 + 5/21 = -84/21 + 5/21 = -79/21

Now, we can add the fractions:

-36/14 + 107/14 + (-79/21)

To add fractions with the same denominator, we add the numerators and keep the denominator the same:

(-36 + 107 - 79)/14 = -8/14

Simplifying the fraction, we get:

-8/14 = -4/7

Therefore, the expression -3 3/7 + 7 9/14 + (-4 5/21) simplifies to -4/7.