Question

2*( - 7 15 - 2 3 ) - 11 21 : 5 7

Answer 1

"/" - знак деления (дроби).

2×(-715-23)-1121÷57 = 2×(-738)-1121÷57 = -1476-1121÷57 = -1476-59/3 = -(4428+59) / 3 = -4487 / 3 = -1495 2/3.

Answer 2

Let's solve the expression step by step:

1. Evaluate the expression inside the first set of parentheses: -7 * 15 - 2 * 3 = -105 - 6 = -111

2. Evaluate the expression inside the second set of parentheses: 11 / 21 = 0.52381 (rounded to five decimal places)

3. Divide the result from step 1 by the result from step 2: -111 / 0.52381 = -211.90476 (rounded to five decimal places)

4. Finally, divide the result from step 3 by the last two numbers: -211.90476 / 5 / 7 = -6.0265 (rounded to five decimal places)

So, the value of the given expression is approximately -6.0265.