Question

Вычислите : 1 ) 4 2/7 * 1 13/15 - 2 1/13 * 1 4/9 = 2) 2.4 * 1 5/12 * 17/17 - 3 1/7 = 3) 39 5/7 * 3 15/37 -2 5/7 * 3 15/37 = 4) 2 5/9 * 1 13/28 + 4 4/9 * 1 13/28 = 5) 25 18/47 - 12 30/41 + 8 29/41 =

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

To calculate the given expressions, we'll perform the operations step by step. We'll start by converting mixed numbers to improper fractions, then perform the arithmetic operations.

1. $4\frac{2}{7} \times 1\frac{13}{15} - 2\frac{1}{13} \times 1\frac{4}{9}$

Converting mixed numbers to improper fractions: $4\frac{2}{7} = \frac{(4 \times 7) + 2}{7} = \frac{30}{7}$ $1\frac{13}{15} = \frac{(1 \times 15) + 13}{15} = \frac{28}{15}$ $2\frac{1}{13} = \frac{(2 \times 13) + 1}{13} = \frac{27}{13}$ $1\frac{4}{9} = \frac{(1 \times 9) + 4}{9} = \frac{13}{9}$

Now, perform the operations: $4\frac{2}{7} \times 1\frac{13}{15} = \frac{30}{7} \times \frac{28}{15} = \frac{840}{105} = \frac{8}{1}$ $2\frac{1}{13} \times 1\frac{4}{9} = \frac{27}{13} \times \frac{13}{9} = \frac{27}{9} = \frac{3}{1}$

Subtract the results: $\frac{8}{1} - \frac{3}{1} = \frac{8-3}{1} = \frac{5}{1} = 5$

2. $2.4 \times 1\frac{5}{12} \times \frac{17}{17} - 3\frac{1}{7}$

Converting mixed numbers to improper fractions: $1\frac{5}{12} = \frac{(1 \times 12) + 5}{12} = \frac{17}{12}$

Now, perform the operations: $2.4 \times 1\frac{5}{12} \times \frac{17}{17} = 2.4 \times \frac{17}{12} = 2.4 \times \frac{17}{12} = \frac{51}{5.0} = 10.2$

Subtract the result from the second term: $10.2 - 3\frac{1}{7} = 10.2 - \frac{22}{7} = \frac{72}{7} \approx 10.29$

3. $39\frac{5}{7}\times 3\frac{15}{37}-2\frac{}{}$ 0 0