Answer:
5.71+18 would equal 23.71
Explanation:
If my explanation makes sense, it will help you in the future!
Always see if the numbers you are adding are both decimals, both whole numbers, or one is a decimal and one is a whole number. In this case, it's one decimal, one whole number. So you could easily just add the two whole numbers(5+18) and then put the decimal at the end.
Hope this helps!