What is the vaule of 2.3 - (-2.3)

Since you're subtracting integers, use LOO (Leave, Opposite, Opposite).

You leave 2.3 alone.

You turn the minus to a positive, since you opposite the sign.

Then, you change the sign of the (-2.3), so now it becomes a positive 2.3.

2.3+2.3=4.6

The answer is 4.6.