Let's solve the expression \( 7.23 \times (-1.31 + -4.2) \).

1. **Simplify the expression inside the parentheses:**
   \[
   -1.31 + (-4.2) = -1.31 - 4.2 = -5.51
   \]

2. **Multiply by 7.23:**
   \[
   7.23 \times (-5.51) = -39.8673
   \]

So, the value of the expression is \( \boxed{-39.8673} \).

Would you like more details or have any questions about this? Here are some related questions you might find useful:

1. How does multiplying a positive number by a negative number affect the sign of the product?
2. What is the difference between adding two negative numbers and subtracting them?
3. How can you verify multiplication with decimal numbers using estimation?
4. What is the impact of the order of operations on calculations involving parentheses?
5. How does the distributive property apply to expressions like this?

**Tip:** Always pay attention to the signs when adding or subtracting numbers, especially when working with decimals.

Learn how to solve the arithmetic expression 7.23 times the sum of -1.31 and -4.2 with a detailed step-by-step solution. This problem covers arithmetic operations with decimals and the order of operations. Suitable for students in Grades 7-9.

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