Question

2 7/1 * 2 5/7 + 7/5 * 2 5/4 плизз))

Answer 1

$2 \frac{1}{1} \times 2 \times 5 + \frac{7}{5} \times 2 \frac{5}{4} =$
$\frac{20}{1} + \frac{7}{2} =$
$20 + \frac{7}{2} =$
$\frac{47}{2} = 23 \frac{1}{2} = 23.5$

Answer 2

Sure!

Let's start by simplifying the mixed numbers in the expression:

2 7/1 = 2 * 1 + 7/1 = 15/1 2 5/7 = 2 * 7 + 5/7 = 19/7 2 5/4 = 2 * 4 + 5/4 = 13/4

Substituting these values back into the expression, we get:

15/1 * 19/7 + 7/5 * 13/4

To multiply fractions, we multiply their numerators together and their denominators together. So:

15/1 * 19/7 = (15 * 19)/(1 * 7) = 285/7

7/5 * 13/4 = (7 * 13)/(5 * 4) = 91/20

Now we can add these two fractions together. To do so, we need a common denominator. The smallest common multiple of 7 and 20 is 140, so:

285/7 * 20/20 = 5700/140 91/20 * 7/7 = 637/140

So the final expression is:

5700/140 + 637/140

We can add these fractions directly since they have the same denominator:

(5700 + 637)/140 = 6337/140

Therefore, 2 7/1 * 2 5/7 + 7/5 * 2 5/4 = 6337/140.