Question

(15,54:(-4,2)-2,5)×1,4+1,08

Answer 1

Преабразовываем десятичные дроби в обыкновенные
1.(777/50÷(-21/5)-5/2)×7/5+27/25
2. (-37/10-5/2)×7/5+27/25
3. -31/5×7/5+27/25
4. 217/25+27/25=-38/5 или -7,6

Answer 2

To solve the expression, let's follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

The expression is: (15,54:(-4,2)-2,5)×1,4+1,08

Step 1: Simplify the expression within the parentheses: 15 + 54 : (-4,2) - 2.5 Before we proceed, it is unclear what you mean by "(15,54:(-4,2)" and how it relates to the other parts of the expression. The ":" symbol seems to be used in an unusual way.

If you could provide more context or clarify the expression, I would be happy to help you solve it. As it stands, the expression is not well-defined and cannot be simplified.