Well, isn't that just a happy little question! When we add 12 and 9 together, we get 21. Just imagine those numbers coming together like old friends, creating a beautiful sum that brings a smile to your face.
It is: 12+9 = 21
3 and 9 Difference: 9-3=6 Sum: 9+3=12
9+12 = 21
9 x 3 = 27 9 + 3 = 12
9 + 12 = 21
-6
21
9
The expression is -9 + 13 + 12
3 + 9 = 12
9
12