Question

1)2 8/10+3 4/15 2)8-3 4/15 3)5 8/10-2 2/15

Answer 1

Пошаговое объяснение:

если не понятно, спроси - объясню

Answer 2

Let's simplify each of the expressions step by step:

1. $2\frac{8}{10} + 3\frac{4}{15}$

First, simplify the fractions: $2\frac{4}{5} + 3\frac{4}{15}$

Next, find a common denominator for $5$ and $15$, which is $15$: $2\frac{12}{15} + 3\frac{4}{15}$

Now, add the fractions with the common denominator: $2\frac{12}{15} + 3\frac{4}{15} = \frac{2 \cdot 12}{15} + \frac{3 \cdot 4}{15} = \frac{24}{15} + \frac{12}{15}$

Combine the fractions: $\frac{24}{15} + \frac{12}{15} = \frac{24 + 12}{15} = \frac{36}{15}$

Finally, simplify the fraction: $\frac{36}{15} = \frac{12 \cdot 3}{5 \cdot 3} = \frac{12}{5}$

So, $2\frac{8}{10} + 3\frac{4}{15} = \frac{12}{5}$.

2. $8 - 3\frac{4}{15}$

Subtract the mixed number from $8$: $8 - 3\frac{4}{15} = 8 - \left(3 + \frac{4}{15}\right)$

Now, subtract the whole numbers separately and then subtract the fractions: $8 - 3 - \frac{4}{15} = 5 - \frac{4}{15}$

3. $5\frac{8}{10} - 2\frac{2}{15}$

First, simplify the fractions: $5\frac{4}{5} - 2\frac{2}{15}$

Next, find a common denominator for $5$ and $15$, which is $15$: $5\frac{12}{15} - 2\frac{2}{15}$

Now, subtract the fractions with the common denominator: $5\frac{12}{15} - 2\frac{2}{15} = \frac{5 \cdot 12}{15} - \frac{2 \cdot 2}{15} = \frac{60}{15} - \frac{4}{15}$

Combine the fractions: $\frac{60}{15} - \frac{4}{15} = \frac{60 - 4}{15} = \frac{56}{15}$

So, $5\frac{8}{10} - 2\frac{2}{15} = \frac{56}{15}$