Question

А) -2/7×3/8+(-2/7)×5/8б) (-1 1/3+0,2)×3​

Answer 1

Ответ:

-2/7*3/8+(-2/7)*5/8= -2/7

(-1 1/3+0,2)*3= -11/15

Пошаговое объяснение:

если не правильно прости

Answer 2

Ответ:

1 ответ -2/7

2-10,401

вот

Answer 3

Let's simplify the given expressions:

А) $-\frac{2}{7} \times \frac{3}{8} + \left(-\frac{2}{7}\right) \times \frac{5}{8}$

First, find the common denominator for the fractions, which is 56:

$-\frac{2}{7} \times \frac{3}{8} = -\frac{6}{56}$

$\left(-\frac{2}{7}\right) \times \frac{5}{8} = -\frac{10}{56}$

Now, add the two results:

$-\frac{6}{56} - \frac{10}{56} = -\frac{16}{56}$

Simplify the result if possible:

$-\frac{16}{56}$ can be simplified by dividing both the numerator and denominator by 8:

$-\frac{2}{7}$

So, the simplified result for part A is $-\frac{2}{7}$.

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B) $\left(-1 \frac{1}{3} + 0.2\right) \times 3$

First, convert the mixed number to an improper fraction:

$-1 \frac{1}{3} = -\frac{4}{3}$

Now, add the two terms:

$-\frac{4}{3} + 0.2$

To combine these, find a common denominator. The common denominator is 3:

$-\frac{4}{3} + \frac{2}{10}$ (since $0.2 = \frac{2}{10}$)

Now, adjust the second fraction to have a denominator of 3:

$-\frac{4}{3} + \frac{2}{10} \times \frac{3}{3} = -\frac{4}{3} + \frac{6}{30}$

Combine the fractions:

$-\frac{4}{3} + \frac{6}{30} = -\frac{40}{30} + \frac{6}{30} = -\frac{34}{30}$

Now, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 2:

$-\frac{34}{30} = -\frac{17}{15}$

Finally, multiply by 3:

$-\frac{17}{15} \times 3 = -\frac{51}{15}$

Simplify further:

$-\frac{51}{15}$ can be simplified by dividing both the numerator and denominator by 3:

$-\frac{17}{5}$

So, the simplified result for part B is $-\frac{17}{5}$.