Question

6/7+8/15-2/5=. 5/18+7/9=....

Answer 1

Ответ:6/7+8/15-2/5=104/105

5/18+7/9=19/18

Пошаговое объяснение:

Answer 2

Ответ:

Пошаговое объяснение:

Первое 6 ответ

Answer 3

Let's solve the given expressions step by step:

1. $\frac{6}{7} + \frac{8}{15} - \frac{2}{5}$

To add or subtract fractions, we need to find a common denominator. The least common multiple (LCM) of 7, 15, and 5 is 105. We'll rewrite each fraction with the common denominator:

$\frac{6}{7} = \frac{6 \times 15}{7 \times 15} = \frac{90}{105}$

$\frac{8}{15} = \frac{8 \times 7}{15 \times 7} = \frac{56}{105}$

$\frac{2}{5} = \frac{2 \times 21}{5 \times 21} = \frac{42}{105}$

Now, let's combine the fractions:

$\frac{6}{7} + \frac{8}{15} - \frac{2}{5} = \frac{90}{105} + \frac{56}{105} - \frac{42}{105}$

Combining the fractions:

$\frac{90 + 56 - 42}{105} = \frac{104}{105}$

So, $\frac{6}{7} + \frac{8}{15} - \frac{2}{5} = \frac{104}{105}$

2. $\frac{5}{18} + \frac{7}{9}$

We can see that 9 is the least common multiple (LCM) of 18 and 9. We'll rewrite the fractions with the common denominator:

$\frac{5}{18} = \frac{5 \times 1}{18 \times 1} = \frac{5}{18}$

$\frac{7}{9} = \frac{7 \times 2}{9 \times 2} = \frac{14}{18}$

Now, let's combine the fractions:

$\frac{5}{18} + \frac{7}{9} = \frac{5}{18} + \frac{14}{18}$

Combining the fractions:

$\frac{5 + 14}{18} = \frac{19}{18}$

Now, $\frac{5}{18} + \frac{7}{9} = \frac{19}{18}$

So, the final results are:

$\frac{6}{7} + \frac{8}{15} - \frac{2}{5} = \frac{104}{105}$

$\frac{5}{18} + \frac{7}{9} = \frac{19}{18}$