Question

-7,2+(-8,23); -4,5+(-27,8);

Answer 1

-7,2+(-8,23)=- 15,43

-4,5+(-27,8)=- 32,3

Answer 2

It looks like you want to perform some arithmetic calculations with decimal numbers. Let's go through each calculation step by step:

1. -7.2 + (-8.23): Adding these two numbers gives you: -7.2 + (-8.23) = -15.43

2. -4.5 + (-27.8): Adding these two numbers gives you: -4.5 + (-27.8) = -32.3

So, the results of the calculations are:

1. -7.2 + (-8.23) = -15.43
2. -4.5 + (-27.8) = -32.3