Question

1) 1 4/7•7/8 2) 2 1/5 • 5/11 3) 3/7•3 4/15

Answer 1

Ответ:

1)

$1\frac{4}{7}\cdot\frac{7}{8}=\frac{11}{7}\cdot\frac{7}{8}=\frac{11}{1}\cdot\frac{1}{8}=\frac{11}{8}=1\frac{3}{8}$

2)

$2\frac{1}{5} \cdot\frac{5}{11} =\frac{11}{5}\cdot\frac{5}{11}=\frac{11}{1}\cdot\frac{1}{11}=1$

3)

$\frac{3}{7}\cdot\frac{4}{15} = \frac{1}{7}\cdot\frac{4}{5} =\frac{4}{35}$

Answer 2

1) 1 3/8 или же 1,375

2) 1

3) 1 2/5 или же 1,4

Answer 3

Let's solve the given multiplication problems step by step:

1. 1 4/7 * 7/8:

To multiply mixed numbers, we first convert them into improper fractions: 1 4/7 = (7 * 1 + 4) / 7 = 11/7

Now, we can multiply the fractions: (11/7) * (7/8) = (11 * 7) / (7 * 8) = 77/56

2. 2 1/5 * 5/11:

Converting mixed numbers into improper fractions: 2 1/5 = (5 * 2 + 1) / 5 = 11/5

Multiplying the fractions: (11/5) * (5/11) = (11 * 5) / (5 * 11) = 55/55 = 1

3. 3/7 * 3 4/15:

Converting mixed numbers into improper fractions: 3 4/15 = (15 * 3 + 4) / 15 = 49/15

Multiplying the fractions: (3/7) * (49/15) = (3 * 49) / (7 * 15) = 147/105 = 7/5 or 1 2/5

So, the results are:

1. 1 4/7 * 7/8 = 77/56
2. 2 1/5 * 5/11 = 1
3. 3/7 * 3 4/15 = 7/5 or 1 2/5