Let's solve the expression step by step:

\[
-22.7 + (-9.07) - 0.81 + 3.19
\]

1. Add \(-22.7\) and \(-9.07\):

\[
-22.7 + (-9.07) = -31.77
\]

2. Subtract \(0.81\) from \(-31.77\):

\[
-31.77 - 0.81 = -32.58
\]

3. Finally, add \(3.19\) to \(-32.58\):

\[
-32.58 + 3.19 = -29.39
\]

So, the result is:

\[
\boxed{-29.39}
\]

Would you like further details, or have any questions?

Here are 5 related questions for practice:
1. What is the result of \(-45.6 + (-10.2) + 6.4\)?
2. Simplify \(-8.55 + 2.34 - (-1.75)\).
3. Solve the expression \(-13.5 + 4.67 - 2.81\).
4. What is the sum of \(-25.8\) and \(-3.92\)?
5. Calculate \(-15.23 - (-4.8) + 9.65\).

**Tip:** When working with negative numbers, remember that subtracting a negative is the same as adding a positive.

Learn how to solve the arithmetic expression -22.7 + (-9.07) - 0.81 + 3.19 step by step. This problem demonstrates the addition and subtraction of negative numbers, a key concept in arithmetic. Suitable for students in Grades 6-8.

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