7 1/7*15 3/4*28,5:4,2*12,5*10 5/9

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вопрос

To solve this problem, we can follow the order of operations (parentheses, exponents, multiplication/division, addition/subtraction) to simplify the expression step by step:

Perform the multiplication
(50/7) (63/4) = (50 63) / (7 * 4) = 3150 / 28

Next, simplify the result
3150 / 28 = 112.5

5:
This is equivalent to 5 divided by 4
5 / 4 = 1.25

2 1
2 12 = 24

5 * 10 5/
First, convert the mixed number to an improper fraction
10 5/9 = 95/9

Now, perform the multiplication
5 (95/9) = (5 95) / 9 = 475 / 9

Therefore, the expression simplifies to
112.5 1.25 24 * 475/9

To calculate the final answer, we need to multiply all the numbers together
112.5 1.25 24 475/9 = 1125 24 475 / (9 100)

Now perform the multiplication
1125 24 475 = 12750000

And finally, divide by 900
12750000 / 900 = 14166.67

Therefore, the final answer is approximately 14166.67.