To add fractions with like denominators we just add numerators (just like we add integers) and denominator leave the same: ca+cb=ca+b.
It is possible that you need to reduce fraction after finding sum.
Example 1. Find 51+52.
51+52=51+2=53.
Try to reduce fraction: 53 is irreducible.
Answer: 53.
Next example.
Example 2. Find 73+75.
73+75=73+5=78.
Try to reduce fraction: 78 is irreducible.
Answer: 78.
Next example.
Example 3. Find 223+(−225).
223+225=223+(−5)=−222.
Try to reduce fraction: −222=−111.
Answer: −111.
Next example.
Example 4. Find −74+718.
−74+718=7−4+18=714.
Try to reduce fraction: 714=2.
Answer: 2.
Next example.
Example 5. Find 1515+151.
1515+151=1515+1=1516.
Try to reduce fraction: 1516 is irreducible.
Answer: 1516.
Now, it is time to do some exercises.
Exercise 1. Find 76+75.
Answer: 711.
Next exercise.
Exercise 2. Find 910+95.
Answer: 35.
Next exercise.
Exercise 3. Find 815+(−87).
Answer: 1.
Next exercise.
Exercise 4. Find 1011+1014.
Answer: 25.
Next exercise.
Exercise 5. Find −24+23.
Answer: −21.