Solve the following calculations:

Let's solve the calculations step by step.

First Calculation:

$$3.3 - (0.12 - 2.26) =$$

First, calculate the expression inside the parentheses:

$$0.12 - 2.26 = -2.14$$

Now, substitute this back into the original expression:

$$3.3 - (-2.14) = 3.3 + 2.14 = 5.44$$

Answer: 5.44

Second Calculation:

$$-6.6 + (-0.3 + 7.13) =$$

First, calculate the expression inside the parentheses:

$$-0.3 + 7.13 = 6.83$$

Now, substitute this back into the original expression:

$$-6.6 + 6.83 = 0.23$$

Answer: 0.23

Third Calculation:

$$0.5 - (-1.5 + 0.4) =$$

First, calculate the expression inside the parentheses:

$$-1.5 + 0.4 = -1.1$$

Now, substitute this back into the original expression:

$$0.5 - (-1.1) = 0.5 + 1.1 = 1.6$$

Answer: 1.6