Let's solve the expression step by step:

The expression is:

\[
2.3(-2 + 3) - (1 + 2) + 2.3
\]

1. Simplify inside the parentheses first:
   \[
   -2 + 3 = 1 \quad \text{and} \quad 1 + 2 = 3
   \]
   
   The expression becomes:
   \[
   2.3(1) - 3 + 2.3
   \]

2. Multiply:
   \[
   2.3(1) = 2.3
   \]
   Now the expression is:
   \[
   2.3 - 3 + 2.3
   \]

3. Combine the terms:
   \[
   2.3 + 2.3 = 4.6
   \]
   So, we now have:
   \[
   4.6 - 3 = 1.6
   \]

The final result is:

\[
\boxed{1.6}
\]

Do you want more details or have any questions?

Here are 5 related questions:
1. How would the result change if one of the numbers inside the parentheses was different?
2. Can you create a similar expression with fractions instead of decimals?
3. What happens if you change the order of operations in this problem?
4. How would the expression look if it involved exponents instead of multiplication?
5. What if you needed to calculate this with negative decimal numbers?

**Tip:** Always simplify inside parentheses first, then follow the order of operations: parentheses, exponents, multiplication/division, addition/subtraction (PEMDAS).

Learn how to simplify the expression 2.3(-2+3)-(1+2)+2.3 with a step-by-step solution. This problem involves basic arithmetic operations and the order of operations (PEMDAS). Suitable for students in Grades 6-8.

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