What is:

7.9+ 0.03?
or can you explain to me how to work this problem out?

Yes. Think of money. You have 7 dollars and 90 cents. You find three cents. Now how much do you have?

Also -- check out Google's answer.

https://www.google.com/search?source=hp&ei=UU5UXdSZE9G8tgXx8LXoDQ&q=7.9%2B+0.03+%3D+&oq=7.9%2B+0.03+%3D+&gs_l=psy-ab.3..33i160.2423.6068..6577...0.0..0.186.702.0j5......0....2j1..gws-wiz.......33i299.8JVboV6PpZ8&ved=0ahUKEwiUhqHA-oLkAhVRnq0KHXF4Dd0Q4dUDCAc&uact=5

First, line up the decimal points.

7.90
0.03
________
7.93

You are welcome. :-)

The first thing I told you on the other problem was _____?

Jiskha tutors are adults with at least one four-year college degree. In addition, they must post good answers on Jiskha regularly for a few weeks.

You seem to have a reading problem.

The emoji is fine.

1.73

2.4
+ 1.27

Why isn't the last decimal point lined up?

Now add.

Wait, That's not the answer is it?

Wow! Thanks! Really helped me a lot! I'm not gonna lie.

Also, One more question. What is:

1.73
24
+1.27
_______