Let the number be x and so the expression is: 12+x/2
12
half of 12 is 6.
12.5 is half of the number 25.
12 and a half
48
12 is half of 24. 12 ends in a 2, 24 begins with a 2
51
Yes, it is.
The number 2.
18
half of 6 = 3 and 4 times 3 = 12.
1 dozen = 12 half a dozen = 6