What is the property to express 24+36

Find the GCF between 24 and 36 by prime factorization:

24 = 2 * 2 * 2 * 3

36 = 2 * 2 * 3 * 3

Now, notice that the common between the prime factorization of both numbers are 2*2*3 which is what we call Greatest Common Factor and over here equal to 12.

Take 12 as a common factor in the above addition:

24 + 36 = 12 (2 + 3)