The prime factorization of 18 is 2 x 3 x 3 = 18. The prime factorization of 27 is 3 x 3 x 3 = 27. The occurrences of common prime factors of 18 and 27 are 3 and 3. So the greatest common factor of 18 and 27 is 3 x 3 = 9. Hope this helped
Greater than 50:
2 x (8 + 20 - 12 / 8) is 52
Less than 10:
2 x (8 +(20 - 12)) ÷ 6 is 5.33
You do 12 time 2 the 8 times 2 and you can add 15 and 10 and the subtract
Subtraction property of equality. Subtract both sides by 7, giving you the answer of 8.