Question

2 1/7•3 1/9 3/7•7/9 5/8•1 13/15•2 2/7

Answer 1

Ответ:

1) 2 1/7* 3 1/9=15/7*28/9=20/3=6 2/3

2) 3/7*7/9=1/3

3) 5/8* 1 13/15* 2 2/7=5/8* 28/15* 16/7=2 2/3

Надеюсь, помогла:)

Answer 2

Ответ:

...=15/7×28/9=20/3

...=1/3

...=5/8×28/15×16/7=8/3

Пошаговое объяснение:

Answer 3

It looks like you've provided a series of mixed numbers and fractions along with multiplication operations. Let's solve this step by step:

1. $2 \frac{1}{7}$ times $3 \frac{1}{9}$: To multiply mixed numbers, first convert them to improper fractions: $2 \frac{1}{7} = \frac{15}{7}$ and $3 \frac{1}{9} = \frac{28}{9}$. Now, multiply the fractions: $\frac{15}{7} \times \frac{28}{9} = \frac{420}{63} = \frac{20}{3}$.

2. $\frac{3}{7}$ times $\frac{7}{9}$: Multiply the fractions directly: $\frac{3}{7} \times \frac{7}{9} = \frac{21}{63} = \frac{1}{3}$.

3. $\frac{5}{8}$ times $1 \frac{13}{15}$: Convert the mixed number to an improper fraction: $1 \frac{13}{15} = \frac{28}{15}$. Multiply the fractions: $\frac{5}{8} \times \frac{28}{15} = \frac{140}{120} = \frac{7}{6}$.

4. $2 \frac{2}{7}$: Convert the mixed number to an improper fraction: $2 \frac{2}{7} = \frac{16}{7}$.

Now, let's multiply all the results together:

$\frac{20}{3} \times \frac{1}{3} \times \frac{7}{6} \times \frac{16}{7}$

When multiplying fractions, you can multiply the numerators together and the denominators together:

Numerator: $20 \times 1 \times 7 \times 16 = 2240$ Denominator: $3 \times 3 \times 6 \times 7 = 378$

So, the final result is: $\frac{2240}{378} = \frac{320}{54} = \frac{160}{27}$.

Therefore, the result of the expression is $\frac{160}{27}$.