SOLUTION: Hi!, on a test, i had this kind of question and i have no idea how to find the answer. Find the exact rational sum of the following two recurring decimals and write it in the fo

Algebra ->  Real-numbers -> SOLUTION: Hi!, on a test, i had this kind of question and i have no idea how to find the answer. Find the exact rational sum of the following two recurring decimals and write it in the fo      Log On


   



Question 1021601: Hi!, on a test, i had this kind of question and i have no idea how to find the answer.
Find the exact rational sum of the following two recurring decimals and write it in the form +a%2Bm%2Fn+ where a,m,n is an element of integers
1.1353535...+2.187777...
Any help would be appreciated!!

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If we try to get the sum directly by writing out eleven decimal places of each number, we would get
1.13535353535
2.18777777777
-------------
3.32313131312
which, again, by virtue of periodicity of the decimal parts of the given numbers, the sum itself would have a periodic decimal part.
This number is 3 + 0.3231313131... = 3+%2B+3199%2F9900.