Hello!
To find the answer for Blank 1, you'll first need to line up your numbers according to the decimal
29.400
+
00.337
------------
Now the hundredth and the thousandth place of 0.337 will be left untouched during the equation but the tenths place will be added with 4 to get 7. After that, all you need to do is add everything else with 0. Once that is done, you should have an answer of...
29.737
I hope this helps!